diff --git a/.env b/.env
index a1c899d42..73496e2ef 100644
--- a/.env
+++ b/.env
@@ -5,7 +5,7 @@ DATABASE_URL=postgresql://sendou@localhost:5432/sendou_ink_trpc?schema=public
 // you can get them by making an application on https://discord.com/developers
 DISCORD_CLIENT_ID=581483359159582722
 DISCORD_CLIENT_SECRET=qxFxBlALcRsqUG2m7WYLHJ8rzjbddBTx
-DISCORD_CALLBACK_URL=http://localhost:3001/auth/discord/callback
+DISCORD_CALLBACK_URL=http://localhost:3000/auth/discord/callback
 COOKIE_SECRET=secret
 FRONTEND_URL=http://localhost:3000
 
diff --git a/.env.example b/.env.example
index c5a374ac4..87aecf84b 100644
--- a/.env.example
+++ b/.env.example
@@ -5,8 +5,5 @@ DATABASE_URL=postgresql://sendou@localhost:5432/sendou_ink?schema=public
 // you can get them by making an application on https://discord.com/developers
 DISCORD_CLIENT_ID=
 DISCORD_CLIENT_SECRET=
-DISCORD_CALLBACK_URL=http://localhost:3001/auth/discord/callback
+DISCORD_CALLBACK_URL=http://localhost:3000/auth/discord/callback
 COOKIE_SECRET=
-FRONTEND_URL=http://localhost:3000
-
-VITE_BACKEND_URL=http://localhost:3001
diff --git a/app/components/Layout/UserItem.tsx b/app/components/Layout/UserItem.tsx
index 56d9f08cb..6d95362ae 100644
--- a/app/components/Layout/UserItem.tsx
+++ b/app/components/Layout/UserItem.tsx
@@ -1,19 +1,20 @@
+import { useUserContext } from "~/root";
 import { DiscordIcon } from "../icons/Discord";
 
 // TODO: redirect to same page on login
 export function UserItem() {
-  const user = null;
+  const user = useUserContext();
 
   if (user)
     return (
       <img
         className="layout__avatar"
-        src={`https://cdn.discordapp.com/avatars/discordId/discordAvatar.png?size=80`}
+        src={`https://cdn.discordapp.com/avatars/${user.discordId}/${user.discordAvatar}.png?size=80`}
       />
     );
 
   return (
-    <form action="/" method="post" data-cy="log-in-form">
+    <form action="/auth/discord" method="post" data-cy="log-in-form">
       <button
         type="submit"
         className="layout__log-in-button"
diff --git a/app/root.tsx b/app/root.tsx
index 79720d5d0..3296e2955 100644
--- a/app/root.tsx
+++ b/app/root.tsx
@@ -7,8 +7,9 @@ import {
   Scripts,
   ScrollRestoration,
   useCatch,
+  useLoaderData,
 } from "remix";
-import type { LinksFunction } from "remix";
+import type { LinksFunction, LoaderFunction } from "remix";
 
 import normalizeStylesUrl from "~/styles/normalize.css";
 import globalStylesUrl from "~/styles/global.css";
@@ -23,12 +24,33 @@ export const links: LinksFunction = () => {
   ];
 };
 
+export const loader: LoaderFunction = ({ context }) => {
+  const { user } = context;
+  console.log({ user });
+
+  return user ?? null;
+};
+
+type LoggedInUser = {
+  id: number;
+  discordId: string;
+  discordAvatar: string;
+} | null;
+
+const UserContext = React.createContext<LoggedInUser>(null);
+
+export const useUserContext = () => React.useContext<LoggedInUser>(UserContext);
+
 export default function App() {
+  const data = useLoaderData();
+
   return (
     <Document>
-      <Layout>
-        <Outlet />
-      </Layout>
+      <UserContext.Provider value={data}>
+        <Layout>
+          <Outlet />
+        </Layout>
+      </UserContext.Provider>
     </Document>
   );
 }
diff --git a/app/services/user.ts b/app/services/user.ts
new file mode 100644
index 000000000..9cb8c1ac5
--- /dev/null
+++ b/app/services/user.ts
@@ -0,0 +1,62 @@
+import prisma from "../../prisma/client";
+import type { Strategy as DiscordStrategy } from "passport-discord";
+
+export async function upsertUser({
+  loggedInUser,
+  refreshToken,
+}: {
+  loggedInUser: DiscordStrategy.Profile;
+  refreshToken: string;
+}) {
+  return prisma.user.upsert({
+    create: {
+      discordId: loggedInUser.id,
+      discordName: loggedInUser.username,
+      discordDiscriminator: loggedInUser.discriminator,
+      discordAvatar: loggedInUser.avatar,
+      discordRefreshToken: refreshToken,
+      ...parseConnections(loggedInUser.connections),
+    },
+    update: {
+      discordName: loggedInUser.username,
+      discordDiscriminator: loggedInUser.discriminator,
+      discordAvatar: loggedInUser.avatar,
+      discordRefreshToken: refreshToken,
+      ...parseConnections(loggedInUser.connections),
+    },
+    where: {
+      discordId: loggedInUser.id,
+    },
+  });
+}
+
+function parseConnections(
+  connections: DiscordStrategy.ConnectionInfo[] | undefined
+) {
+  if (!connections) return null;
+
+  const result: {
+    twitch?: string;
+    twitter?: string;
+    youtubeId?: string;
+    youtubeName?: string;
+  } = {};
+
+  for (const connection of connections) {
+    if (connection.visibility !== 1 || !connection.verified) continue;
+
+    switch (connection.type) {
+      case "twitch":
+        result.twitch = connection.name;
+        break;
+      case "twitter":
+        result.twitter = connection.name;
+        break;
+      case "youtube":
+        result.youtubeId = connection.id;
+        result.youtubeName = connection.name;
+    }
+  }
+
+  return result;
+}
diff --git a/package-lock.json b/package-lock.json
index b3133f6d4..93a92de53 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -12,9 +12,13 @@
         "@remix-run/react": "^1.0.6",
         "classnames": "^2.3.1",
         "compression": "^1.7.4",
+        "cookie-parser": "^1.4.6",
         "cross-env": "^7.0.3",
         "express": "^4.17.1",
+        "express-session": "^1.17.2",
         "morgan": "^1.10.0",
+        "passport": "^0.5.0",
+        "passport-discord": "^0.1.4",
         "react": "^17.0.2",
         "react-dom": "^17.0.2",
         "remix": "^1.0.6",
@@ -23,9 +27,13 @@
       "devDependencies": {
         "@remix-run/dev": "^1.0.6",
         "@types/compression": "^1.7.2",
+        "@types/cookie-parser": "^1.4.2",
         "@types/express": "^4.17.13",
+        "@types/express-session": "^1.17.4",
         "@types/faker": "^5.5.9",
         "@types/morgan": "^1.9.3",
+        "@types/passport": "^1.0.7",
+        "@types/passport-discord": "^0.1.5",
         "@types/react": "^17.0.37",
         "@types/react-dom": "^17.0.11",
         "concurrently": "^6.4.0",
@@ -403,6 +411,15 @@
       "resolved": "https://registry.npmjs.org/@types/cookie/-/cookie-0.4.1.tgz",
       "integrity": "sha512-XW/Aa8APYr6jSVVA1y/DEIZX0/GMKLEVekNG727R8cs56ahETkRAy/3DR7+fJyh7oUgGwNQaRfXCun0+KbWY7Q=="
     },
+    "node_modules/@types/cookie-parser": {
+      "version": "1.4.2",
+      "resolved": "https://registry.npmjs.org/@types/cookie-parser/-/cookie-parser-1.4.2.tgz",
+      "integrity": "sha512-uwcY8m6SDQqciHsqcKDGbo10GdasYsPCYkH3hVegj9qAah6pX5HivOnOuI3WYmyQMnOATV39zv/Ybs0bC/6iVg==",
+      "dev": true,
+      "dependencies": {
+        "@types/express": "*"
+      }
+    },
     "node_modules/@types/debug": {
       "version": "4.1.7",
       "resolved": "https://registry.npmjs.org/@types/debug/-/debug-4.1.7.tgz",
@@ -450,6 +467,15 @@
         "@types/range-parser": "*"
       }
     },
+    "node_modules/@types/express-session": {
+      "version": "1.17.4",
+      "resolved": "https://registry.npmjs.org/@types/express-session/-/express-session-1.17.4.tgz",
+      "integrity": "sha512-7cNlSI8+oOBUHTfPXMwDxF/Lchx5aJ3ho7+p9jJZYVg9dVDJFh3qdMXmJtRsysnvS+C6x46k9DRYmrmCkE+MVg==",
+      "dev": true,
+      "dependencies": {
+        "@types/express": "*"
+      }
+    },
     "node_modules/@types/faker": {
       "version": "5.5.9",
       "resolved": "https://registry.npmjs.org/@types/faker/-/faker-5.5.9.tgz",
@@ -542,12 +568,52 @@
       "integrity": "sha512-Gj7cI7z+98M282Tqmp2K5EIsoouUEzbBJhQQzDE3jSIRk6r9gsz0oUokqIUR4u1R3dMHo0pDHM7sNOHyhulypw==",
       "dev": true
     },
+    "node_modules/@types/oauth": {
+      "version": "0.9.1",
+      "resolved": "https://registry.npmjs.org/@types/oauth/-/oauth-0.9.1.tgz",
+      "integrity": "sha512-a1iY62/a3yhZ7qH7cNUsxoI3U/0Fe9+RnuFrpTKr+0WVOzbKlSLojShCKe20aOD1Sppv+i8Zlq0pLDuTJnwS4A==",
+      "dev": true,
+      "dependencies": {
+        "@types/node": "*"
+      }
+    },
     "node_modules/@types/parse-json": {
       "version": "4.0.0",
       "resolved": "https://registry.npmjs.org/@types/parse-json/-/parse-json-4.0.0.tgz",
       "integrity": "sha512-//oorEZjL6sbPcKUaCdIGlIUeH26mgzimjBB77G6XRgnDl/L5wOnpyBGRe/Mmf5CVW3PwEBE1NjiMZ/ssFh4wA==",
       "dev": true
     },
+    "node_modules/@types/passport": {
+      "version": "1.0.7",
+      "resolved": "https://registry.npmjs.org/@types/passport/-/passport-1.0.7.tgz",
+      "integrity": "sha512-JtswU8N3kxBYgo+n9of7C97YQBT+AYPP2aBfNGTzABqPAZnK/WOAaKfh3XesUYMZRrXFuoPc2Hv0/G/nQFveHw==",
+      "dev": true,
+      "dependencies": {
+        "@types/express": "*"
+      }
+    },
+    "node_modules/@types/passport-discord": {
+      "version": "0.1.5",
+      "resolved": "https://registry.npmjs.org/@types/passport-discord/-/passport-discord-0.1.5.tgz",
+      "integrity": "sha512-hq/EcxU+gKaGdgTAX9LDMEt+/FmDJphq84qRUt5jt553a5RPCwxonb7QwOZUO3XBhzLTXIbJmPQd5/5bTXJnyA==",
+      "dev": true,
+      "dependencies": {
+        "@types/express": "*",
+        "@types/passport": "*",
+        "@types/passport-oauth2": "*"
+      }
+    },
+    "node_modules/@types/passport-oauth2": {
+      "version": "1.4.11",
+      "resolved": "https://registry.npmjs.org/@types/passport-oauth2/-/passport-oauth2-1.4.11.tgz",
+      "integrity": "sha512-KUNwmGhe/3xPbjkzkPwwcPmyFwfyiSgtV1qOrPBLaU4i4q9GSCdAOyCbkFG0gUxAyEmYwqo9OAF/rjPjJ6ImdA==",
+      "dev": true,
+      "dependencies": {
+        "@types/express": "*",
+        "@types/oauth": "*",
+        "@types/passport": "*"
+      }
+    },
     "node_modules/@types/prop-types": {
       "version": "15.7.4",
       "resolved": "https://registry.npmjs.org/@types/prop-types/-/prop-types-15.7.4.tgz",
@@ -796,6 +862,14 @@
       "integrity": "sha512-3oSeUO0TMV67hN1AmbXsK4yaqU7tjiHlbxRDZOpH0KW9+CeX4bRAaX0Anxt0tx2MrpRpWwQaPwIlISEJhYU5Pw==",
       "dev": true
     },
+    "node_modules/base64url": {
+      "version": "3.0.1",
+      "resolved": "https://registry.npmjs.org/base64url/-/base64url-3.0.1.tgz",
+      "integrity": "sha512-ir1UPr3dkwexU7FdV8qBBbNDRUhMmIekYMFZfi+C/sLNnRESKPl23nB9b2pltqfOQNnGzsDdId90AEtG5tCx4A==",
+      "engines": {
+        "node": ">=6.0.0"
+      }
+    },
     "node_modules/basic-auth": {
       "version": "2.0.1",
       "resolved": "https://registry.npmjs.org/basic-auth/-/basic-auth-2.0.1.tgz",
@@ -1318,6 +1392,23 @@
         "node": ">= 0.6"
       }
     },
+    "node_modules/cookie-parser": {
+      "version": "1.4.6",
+      "resolved": "https://registry.npmjs.org/cookie-parser/-/cookie-parser-1.4.6.tgz",
+      "integrity": "sha512-z3IzaNjdwUC2olLIB5/ITd0/setiaFMLYiZJle7xg5Fe9KWAceil7xszYfHHBtDFYLSgJduS2Ty0P1uJdPDJeA==",
+      "dependencies": {
+        "cookie": "0.4.1",
+        "cookie-signature": "1.0.6"
+      },
+      "engines": {
+        "node": ">= 0.8.0"
+      }
+    },
+    "node_modules/cookie-parser/node_modules/cookie-signature": {
+      "version": "1.0.6",
+      "resolved": "https://registry.npmjs.org/cookie-signature/-/cookie-signature-1.0.6.tgz",
+      "integrity": "sha1-4wOogrNCzD7oylE6eZmXNNqzriw="
+    },
     "node_modules/cookie-signature": {
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/cookie-signature/-/cookie-signature-1.1.0.tgz",
@@ -2040,6 +2131,56 @@
         "node": ">= 0.10.0"
       }
     },
+    "node_modules/express-session": {
+      "version": "1.17.2",
+      "resolved": "https://registry.npmjs.org/express-session/-/express-session-1.17.2.tgz",
+      "integrity": "sha512-mPcYcLA0lvh7D4Oqr5aNJFMtBMKPLl++OKKxkHzZ0U0oDq1rpKBnkR5f5vCHR26VeArlTOEF9td4x5IjICksRQ==",
+      "dependencies": {
+        "cookie": "0.4.1",
+        "cookie-signature": "1.0.6",
+        "debug": "2.6.9",
+        "depd": "~2.0.0",
+        "on-headers": "~1.0.2",
+        "parseurl": "~1.3.3",
+        "safe-buffer": "5.2.1",
+        "uid-safe": "~2.1.5"
+      },
+      "engines": {
+        "node": ">= 0.8.0"
+      }
+    },
+    "node_modules/express-session/node_modules/cookie-signature": {
+      "version": "1.0.6",
+      "resolved": "https://registry.npmjs.org/cookie-signature/-/cookie-signature-1.0.6.tgz",
+      "integrity": "sha1-4wOogrNCzD7oylE6eZmXNNqzriw="
+    },
+    "node_modules/express-session/node_modules/depd": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/depd/-/depd-2.0.0.tgz",
+      "integrity": "sha512-g7nH6P6dyDioJogAAGprGpCtVImJhpPk/roCzdb3fIh61/s/nPsfR6onyMwkCAR/OlC3yBC0lESvUoQEAssIrw==",
+      "engines": {
+        "node": ">= 0.8"
+      }
+    },
+    "node_modules/express-session/node_modules/safe-buffer": {
+      "version": "5.2.1",
+      "resolved": "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.2.1.tgz",
+      "integrity": "sha512-rp3So07KcdmmKbGvgaNxQSJr7bGVSVk5S9Eq1F+ppbRo70+YeaDxkw5Dd8NPN+GD6bjnYm2VuPuCXmpuYvmCXQ==",
+      "funding": [
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/feross"
+        },
+        {
+          "type": "patreon",
+          "url": "https://www.patreon.com/feross"
+        },
+        {
+          "type": "consulting",
+          "url": "https://feross.org/support"
+        }
+      ]
+    },
     "node_modules/express/node_modules/cookie": {
       "version": "0.4.0",
       "resolved": "https://registry.npmjs.org/cookie/-/cookie-0.4.0.tgz",
@@ -4318,6 +4459,11 @@
       "integrity": "sha512-EPfafl6JL5/rU+ot6P3gRSCpPDW5VmIzX959Ob1+ySFUuuYHWHekXpwdUZcKP5C+DS4GEtdJluwBjnsNDl+fSA==",
       "dev": true
     },
+    "node_modules/oauth": {
+      "version": "0.9.15",
+      "resolved": "https://registry.npmjs.org/oauth/-/oauth-0.9.15.tgz",
+      "integrity": "sha1-vR/vr2hslrdUda7VGWQS/2DPucE="
+    },
     "node_modules/object-assign": {
       "version": "4.1.1",
       "resolved": "https://registry.npmjs.org/object-assign/-/object-assign-4.1.1.tgz",
@@ -4481,6 +4627,57 @@
         "node": ">= 0.8"
       }
     },
+    "node_modules/passport": {
+      "version": "0.5.0",
+      "resolved": "https://registry.npmjs.org/passport/-/passport-0.5.0.tgz",
+      "integrity": "sha512-ln+ue5YaNDS+fes6O5PCzXKSseY5u8MYhX9H5Co4s+HfYI5oqvnHKoOORLYDUPh+8tHvrxugF2GFcUA1Q1Gqfg==",
+      "dependencies": {
+        "passport-strategy": "1.x.x",
+        "pause": "0.0.1"
+      },
+      "engines": {
+        "node": ">= 0.4.0"
+      },
+      "funding": {
+        "type": "github",
+        "url": "https://github.com/sponsors/jaredhanson"
+      }
+    },
+    "node_modules/passport-discord": {
+      "version": "0.1.4",
+      "resolved": "https://registry.npmjs.org/passport-discord/-/passport-discord-0.1.4.tgz",
+      "integrity": "sha512-VJWPYqSOmh7SaCLw/C+k1ZqCzJnn2frrmQRx1YrcPJ3MQ+Oa31XclbbmqFICSvl8xv3Fqd6YWQ4H4p1MpIN9rA==",
+      "dependencies": {
+        "passport-oauth2": "^1.5.0"
+      }
+    },
+    "node_modules/passport-oauth2": {
+      "version": "1.6.1",
+      "resolved": "https://registry.npmjs.org/passport-oauth2/-/passport-oauth2-1.6.1.tgz",
+      "integrity": "sha512-ZbV43Hq9d/SBSYQ22GOiglFsjsD1YY/qdiptA+8ej+9C1dL1TVB+mBE5kDH/D4AJo50+2i8f4bx0vg4/yDDZCQ==",
+      "dependencies": {
+        "base64url": "3.x.x",
+        "oauth": "0.9.x",
+        "passport-strategy": "1.x.x",
+        "uid2": "0.0.x",
+        "utils-merge": "1.x.x"
+      },
+      "engines": {
+        "node": ">= 0.4.0"
+      },
+      "funding": {
+        "type": "github",
+        "url": "https://github.com/sponsors/jaredhanson"
+      }
+    },
+    "node_modules/passport-strategy": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/passport-strategy/-/passport-strategy-1.0.0.tgz",
+      "integrity": "sha1-tVOaqPwiWj0a0XlHbd8ja0QPUuQ=",
+      "engines": {
+        "node": ">= 0.4.0"
+      }
+    },
     "node_modules/path-exists": {
       "version": "4.0.0",
       "resolved": "https://registry.npmjs.org/path-exists/-/path-exists-4.0.0.tgz",
@@ -4527,6 +4724,11 @@
         "node": ">=8"
       }
     },
+    "node_modules/pause": {
+      "version": "0.0.1",
+      "resolved": "https://registry.npmjs.org/pause/-/pause-0.0.1.tgz",
+      "integrity": "sha1-HUCLP9t2kjuVQ9lvtMnf1TXZy10="
+    },
     "node_modules/periscopic": {
       "version": "3.0.4",
       "resolved": "https://registry.npmjs.org/periscopic/-/periscopic-3.0.4.tgz",
@@ -4745,6 +4947,14 @@
         "node": ">=8"
       }
     },
+    "node_modules/random-bytes": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/random-bytes/-/random-bytes-1.0.0.tgz",
+      "integrity": "sha1-T2ih3Arli9P7lYSMMDJNt11kNgs=",
+      "engines": {
+        "node": ">= 0.8"
+      }
+    },
     "node_modules/range-parser": {
       "version": "1.2.1",
       "resolved": "https://registry.npmjs.org/range-parser/-/range-parser-1.2.1.tgz",
@@ -5954,6 +6164,22 @@
         "node": ">=4.2.0"
       }
     },
+    "node_modules/uid-safe": {
+      "version": "2.1.5",
+      "resolved": "https://registry.npmjs.org/uid-safe/-/uid-safe-2.1.5.tgz",
+      "integrity": "sha512-KPHm4VL5dDXKz01UuEd88Df+KzynaohSL9fBh096KWAxSKZQDI2uBrVqtvRM4rwrIrRRKsdLNML/lnaaVSRioA==",
+      "dependencies": {
+        "random-bytes": "~1.0.0"
+      },
+      "engines": {
+        "node": ">= 0.8"
+      }
+    },
+    "node_modules/uid2": {
+      "version": "0.0.4",
+      "resolved": "https://registry.npmjs.org/uid2/-/uid2-0.0.4.tgz",
+      "integrity": "sha512-IevTus0SbGwQzYh3+fRsAMTVVPOoIVufzacXcHPmdlle1jUpq7BRL+mw3dgeLanvGZdwwbWhRV6XrcFNdBmjWA=="
+    },
     "node_modules/unified": {
       "version": "10.1.1",
       "resolved": "https://registry.npmjs.org/unified/-/unified-10.1.1.tgz",
@@ -6768,6 +6994,15 @@
       "resolved": "https://registry.npmjs.org/@types/cookie/-/cookie-0.4.1.tgz",
       "integrity": "sha512-XW/Aa8APYr6jSVVA1y/DEIZX0/GMKLEVekNG727R8cs56ahETkRAy/3DR7+fJyh7oUgGwNQaRfXCun0+KbWY7Q=="
     },
+    "@types/cookie-parser": {
+      "version": "1.4.2",
+      "resolved": "https://registry.npmjs.org/@types/cookie-parser/-/cookie-parser-1.4.2.tgz",
+      "integrity": "sha512-uwcY8m6SDQqciHsqcKDGbo10GdasYsPCYkH3hVegj9qAah6pX5HivOnOuI3WYmyQMnOATV39zv/Ybs0bC/6iVg==",
+      "dev": true,
+      "requires": {
+        "@types/express": "*"
+      }
+    },
     "@types/debug": {
       "version": "4.1.7",
       "resolved": "https://registry.npmjs.org/@types/debug/-/debug-4.1.7.tgz",
@@ -6815,6 +7050,15 @@
         "@types/range-parser": "*"
       }
     },
+    "@types/express-session": {
+      "version": "1.17.4",
+      "resolved": "https://registry.npmjs.org/@types/express-session/-/express-session-1.17.4.tgz",
+      "integrity": "sha512-7cNlSI8+oOBUHTfPXMwDxF/Lchx5aJ3ho7+p9jJZYVg9dVDJFh3qdMXmJtRsysnvS+C6x46k9DRYmrmCkE+MVg==",
+      "dev": true,
+      "requires": {
+        "@types/express": "*"
+      }
+    },
     "@types/faker": {
       "version": "5.5.9",
       "resolved": "https://registry.npmjs.org/@types/faker/-/faker-5.5.9.tgz",
@@ -6907,12 +7151,52 @@
       "integrity": "sha512-Gj7cI7z+98M282Tqmp2K5EIsoouUEzbBJhQQzDE3jSIRk6r9gsz0oUokqIUR4u1R3dMHo0pDHM7sNOHyhulypw==",
       "dev": true
     },
+    "@types/oauth": {
+      "version": "0.9.1",
+      "resolved": "https://registry.npmjs.org/@types/oauth/-/oauth-0.9.1.tgz",
+      "integrity": "sha512-a1iY62/a3yhZ7qH7cNUsxoI3U/0Fe9+RnuFrpTKr+0WVOzbKlSLojShCKe20aOD1Sppv+i8Zlq0pLDuTJnwS4A==",
+      "dev": true,
+      "requires": {
+        "@types/node": "*"
+      }
+    },
     "@types/parse-json": {
       "version": "4.0.0",
       "resolved": "https://registry.npmjs.org/@types/parse-json/-/parse-json-4.0.0.tgz",
       "integrity": "sha512-//oorEZjL6sbPcKUaCdIGlIUeH26mgzimjBB77G6XRgnDl/L5wOnpyBGRe/Mmf5CVW3PwEBE1NjiMZ/ssFh4wA==",
       "dev": true
     },
+    "@types/passport": {
+      "version": "1.0.7",
+      "resolved": "https://registry.npmjs.org/@types/passport/-/passport-1.0.7.tgz",
+      "integrity": "sha512-JtswU8N3kxBYgo+n9of7C97YQBT+AYPP2aBfNGTzABqPAZnK/WOAaKfh3XesUYMZRrXFuoPc2Hv0/G/nQFveHw==",
+      "dev": true,
+      "requires": {
+        "@types/express": "*"
+      }
+    },
+    "@types/passport-discord": {
+      "version": "0.1.5",
+      "resolved": "https://registry.npmjs.org/@types/passport-discord/-/passport-discord-0.1.5.tgz",
+      "integrity": "sha512-hq/EcxU+gKaGdgTAX9LDMEt+/FmDJphq84qRUt5jt553a5RPCwxonb7QwOZUO3XBhzLTXIbJmPQd5/5bTXJnyA==",
+      "dev": true,
+      "requires": {
+        "@types/express": "*",
+        "@types/passport": "*",
+        "@types/passport-oauth2": "*"
+      }
+    },
+    "@types/passport-oauth2": {
+      "version": "1.4.11",
+      "resolved": "https://registry.npmjs.org/@types/passport-oauth2/-/passport-oauth2-1.4.11.tgz",
+      "integrity": "sha512-KUNwmGhe/3xPbjkzkPwwcPmyFwfyiSgtV1qOrPBLaU4i4q9GSCdAOyCbkFG0gUxAyEmYwqo9OAF/rjPjJ6ImdA==",
+      "dev": true,
+      "requires": {
+        "@types/express": "*",
+        "@types/oauth": "*",
+        "@types/passport": "*"
+      }
+    },
     "@types/prop-types": {
       "version": "15.7.4",
       "resolved": "https://registry.npmjs.org/@types/prop-types/-/prop-types-15.7.4.tgz",
@@ -7115,6 +7399,11 @@
       "integrity": "sha512-3oSeUO0TMV67hN1AmbXsK4yaqU7tjiHlbxRDZOpH0KW9+CeX4bRAaX0Anxt0tx2MrpRpWwQaPwIlISEJhYU5Pw==",
       "dev": true
     },
+    "base64url": {
+      "version": "3.0.1",
+      "resolved": "https://registry.npmjs.org/base64url/-/base64url-3.0.1.tgz",
+      "integrity": "sha512-ir1UPr3dkwexU7FdV8qBBbNDRUhMmIekYMFZfi+C/sLNnRESKPl23nB9b2pltqfOQNnGzsDdId90AEtG5tCx4A=="
+    },
     "basic-auth": {
       "version": "2.0.1",
       "resolved": "https://registry.npmjs.org/basic-auth/-/basic-auth-2.0.1.tgz",
@@ -7513,6 +7802,22 @@
       "resolved": "https://registry.npmjs.org/cookie/-/cookie-0.4.1.tgz",
       "integrity": "sha512-ZwrFkGJxUR3EIoXtO+yVE69Eb7KlixbaeAWfBQB9vVsNn/o+Yw69gBWSSDK825hQNdN+wF8zELf3dFNl/kxkUA=="
     },
+    "cookie-parser": {
+      "version": "1.4.6",
+      "resolved": "https://registry.npmjs.org/cookie-parser/-/cookie-parser-1.4.6.tgz",
+      "integrity": "sha512-z3IzaNjdwUC2olLIB5/ITd0/setiaFMLYiZJle7xg5Fe9KWAceil7xszYfHHBtDFYLSgJduS2Ty0P1uJdPDJeA==",
+      "requires": {
+        "cookie": "0.4.1",
+        "cookie-signature": "1.0.6"
+      },
+      "dependencies": {
+        "cookie-signature": {
+          "version": "1.0.6",
+          "resolved": "https://registry.npmjs.org/cookie-signature/-/cookie-signature-1.0.6.tgz",
+          "integrity": "sha1-4wOogrNCzD7oylE6eZmXNNqzriw="
+        }
+      }
+    },
     "cookie-signature": {
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/cookie-signature/-/cookie-signature-1.1.0.tgz",
@@ -8023,6 +8328,38 @@
         }
       }
     },
+    "express-session": {
+      "version": "1.17.2",
+      "resolved": "https://registry.npmjs.org/express-session/-/express-session-1.17.2.tgz",
+      "integrity": "sha512-mPcYcLA0lvh7D4Oqr5aNJFMtBMKPLl++OKKxkHzZ0U0oDq1rpKBnkR5f5vCHR26VeArlTOEF9td4x5IjICksRQ==",
+      "requires": {
+        "cookie": "0.4.1",
+        "cookie-signature": "1.0.6",
+        "debug": "2.6.9",
+        "depd": "~2.0.0",
+        "on-headers": "~1.0.2",
+        "parseurl": "~1.3.3",
+        "safe-buffer": "5.2.1",
+        "uid-safe": "~2.1.5"
+      },
+      "dependencies": {
+        "cookie-signature": {
+          "version": "1.0.6",
+          "resolved": "https://registry.npmjs.org/cookie-signature/-/cookie-signature-1.0.6.tgz",
+          "integrity": "sha1-4wOogrNCzD7oylE6eZmXNNqzriw="
+        },
+        "depd": {
+          "version": "2.0.0",
+          "resolved": "https://registry.npmjs.org/depd/-/depd-2.0.0.tgz",
+          "integrity": "sha512-g7nH6P6dyDioJogAAGprGpCtVImJhpPk/roCzdb3fIh61/s/nPsfR6onyMwkCAR/OlC3yBC0lESvUoQEAssIrw=="
+        },
+        "safe-buffer": {
+          "version": "5.2.1",
+          "resolved": "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.2.1.tgz",
+          "integrity": "sha512-rp3So07KcdmmKbGvgaNxQSJr7bGVSVk5S9Eq1F+ppbRo70+YeaDxkw5Dd8NPN+GD6bjnYm2VuPuCXmpuYvmCXQ=="
+        }
+      }
+    },
     "extend": {
       "version": "3.0.2",
       "resolved": "https://registry.npmjs.org/extend/-/extend-3.0.2.tgz",
@@ -9622,6 +9959,11 @@
       "integrity": "sha512-EPfafl6JL5/rU+ot6P3gRSCpPDW5VmIzX959Ob1+ySFUuuYHWHekXpwdUZcKP5C+DS4GEtdJluwBjnsNDl+fSA==",
       "dev": true
     },
+    "oauth": {
+      "version": "0.9.15",
+      "resolved": "https://registry.npmjs.org/oauth/-/oauth-0.9.15.tgz",
+      "integrity": "sha1-vR/vr2hslrdUda7VGWQS/2DPucE="
+    },
     "object-assign": {
       "version": "4.1.1",
       "resolved": "https://registry.npmjs.org/object-assign/-/object-assign-4.1.1.tgz",
@@ -9736,6 +10078,40 @@
       "resolved": "https://registry.npmjs.org/parseurl/-/parseurl-1.3.3.tgz",
       "integrity": "sha512-CiyeOxFT/JZyN5m0z9PfXw4SCBJ6Sygz1Dpl0wqjlhDEGGBP1GnsUVEL0p63hoG1fcj3fHynXi9NYO4nWOL+qQ=="
     },
+    "passport": {
+      "version": "0.5.0",
+      "resolved": "https://registry.npmjs.org/passport/-/passport-0.5.0.tgz",
+      "integrity": "sha512-ln+ue5YaNDS+fes6O5PCzXKSseY5u8MYhX9H5Co4s+HfYI5oqvnHKoOORLYDUPh+8tHvrxugF2GFcUA1Q1Gqfg==",
+      "requires": {
+        "passport-strategy": "1.x.x",
+        "pause": "0.0.1"
+      }
+    },
+    "passport-discord": {
+      "version": "0.1.4",
+      "resolved": "https://registry.npmjs.org/passport-discord/-/passport-discord-0.1.4.tgz",
+      "integrity": "sha512-VJWPYqSOmh7SaCLw/C+k1ZqCzJnn2frrmQRx1YrcPJ3MQ+Oa31XclbbmqFICSvl8xv3Fqd6YWQ4H4p1MpIN9rA==",
+      "requires": {
+        "passport-oauth2": "^1.5.0"
+      }
+    },
+    "passport-oauth2": {
+      "version": "1.6.1",
+      "resolved": "https://registry.npmjs.org/passport-oauth2/-/passport-oauth2-1.6.1.tgz",
+      "integrity": "sha512-ZbV43Hq9d/SBSYQ22GOiglFsjsD1YY/qdiptA+8ej+9C1dL1TVB+mBE5kDH/D4AJo50+2i8f4bx0vg4/yDDZCQ==",
+      "requires": {
+        "base64url": "3.x.x",
+        "oauth": "0.9.x",
+        "passport-strategy": "1.x.x",
+        "uid2": "0.0.x",
+        "utils-merge": "1.x.x"
+      }
+    },
+    "passport-strategy": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/passport-strategy/-/passport-strategy-1.0.0.tgz",
+      "integrity": "sha1-tVOaqPwiWj0a0XlHbd8ja0QPUuQ="
+    },
     "path-exists": {
       "version": "4.0.0",
       "resolved": "https://registry.npmjs.org/path-exists/-/path-exists-4.0.0.tgz",
@@ -9770,6 +10146,11 @@
       "integrity": "sha512-gDKb8aZMDeD/tZWs9P6+q0J9Mwkdl6xMV8TjnGP3qJVJ06bdMgkbBlLU8IdfOsIsFz2BW1rNVT3XuNEl8zPAvw==",
       "dev": true
     },
+    "pause": {
+      "version": "0.0.1",
+      "resolved": "https://registry.npmjs.org/pause/-/pause-0.0.1.tgz",
+      "integrity": "sha1-HUCLP9t2kjuVQ9lvtMnf1TXZy10="
+    },
     "periscopic": {
       "version": "3.0.4",
       "resolved": "https://registry.npmjs.org/periscopic/-/periscopic-3.0.4.tgz",
@@ -9917,6 +10298,11 @@
       "integrity": "sha512-ARhCpm70fzdcvNQfPoy49IaanKkTlRWF2JMzqhcJbhSFRZv7nPTvZJdcY7301IPmvW+/p0RgIWnQDLJxifsQ7g==",
       "dev": true
     },
+    "random-bytes": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/random-bytes/-/random-bytes-1.0.0.tgz",
+      "integrity": "sha1-T2ih3Arli9P7lYSMMDJNt11kNgs="
+    },
     "range-parser": {
       "version": "1.2.1",
       "resolved": "https://registry.npmjs.org/range-parser/-/range-parser-1.2.1.tgz",
@@ -10825,6 +11211,19 @@
       "integrity": "sha512-5BlMof9H1yGt0P8/WF+wPNw6GfctgGjXp5hkblpyT+8rkASSmkUKMXrxR0Xg8ThVCi/JnHQiKXeBaEwCeQwMFw==",
       "dev": true
     },
+    "uid-safe": {
+      "version": "2.1.5",
+      "resolved": "https://registry.npmjs.org/uid-safe/-/uid-safe-2.1.5.tgz",
+      "integrity": "sha512-KPHm4VL5dDXKz01UuEd88Df+KzynaohSL9fBh096KWAxSKZQDI2uBrVqtvRM4rwrIrRRKsdLNML/lnaaVSRioA==",
+      "requires": {
+        "random-bytes": "~1.0.0"
+      }
+    },
+    "uid2": {
+      "version": "0.0.4",
+      "resolved": "https://registry.npmjs.org/uid2/-/uid2-0.0.4.tgz",
+      "integrity": "sha512-IevTus0SbGwQzYh3+fRsAMTVVPOoIVufzacXcHPmdlle1jUpq7BRL+mw3dgeLanvGZdwwbWhRV6XrcFNdBmjWA=="
+    },
     "unified": {
       "version": "10.1.1",
       "resolved": "https://registry.npmjs.org/unified/-/unified-10.1.1.tgz",
diff --git a/package.json b/package.json
index 13dc4316d..94eb3d498 100644
--- a/package.json
+++ b/package.json
@@ -25,9 +25,13 @@
     "@remix-run/react": "^1.0.6",
     "classnames": "^2.3.1",
     "compression": "^1.7.4",
+    "cookie-parser": "^1.4.6",
     "cross-env": "^7.0.3",
     "express": "^4.17.1",
+    "express-session": "^1.17.2",
     "morgan": "^1.10.0",
+    "passport": "^0.5.0",
+    "passport-discord": "^0.1.4",
     "react": "^17.0.2",
     "react-dom": "^17.0.2",
     "remix": "^1.0.6",
@@ -36,9 +40,13 @@
   "devDependencies": {
     "@remix-run/dev": "^1.0.6",
     "@types/compression": "^1.7.2",
+    "@types/cookie-parser": "^1.4.2",
     "@types/express": "^4.17.13",
+    "@types/express-session": "^1.17.4",
     "@types/faker": "^5.5.9",
     "@types/morgan": "^1.9.3",
+    "@types/passport": "^1.0.7",
+    "@types/passport-discord": "^0.1.5",
     "@types/react": "^17.0.37",
     "@types/react-dom": "^17.0.11",
     "concurrently": "^6.4.0",
diff --git a/prisma/client.ts b/prisma/client.ts
index ae720eaea..b5bf6ce85 100644
--- a/prisma/client.ts
+++ b/prisma/client.ts
@@ -1,5 +1,4 @@
-import pkg from "@prisma/client";
-const { PrismaClient } = pkg;
+import { PrismaClient } from "@prisma/client";
 
 const prisma = new PrismaClient();
 
diff --git a/server/auth.ts b/server/auth.ts
new file mode 100644
index 000000000..d97e60a24
--- /dev/null
+++ b/server/auth.ts
@@ -0,0 +1,74 @@
+import type { Express } from "express";
+import invariant from "tiny-invariant";
+import session from "express-session";
+import cookieParser from "cookie-parser";
+import passport from "passport";
+import { Strategy as DiscordStrategy } from "passport-discord";
+import { upsertUser } from "../app/services/user";
+
+export function setUpAuth(app: Express): void {
+  invariant(
+    process.env.DISCORD_CLIENT_ID,
+    "env var DISCORD_CLIENT_ID undefined"
+  );
+  invariant(
+    process.env.DISCORD_CLIENT_SECRET,
+    "env var DISCORD_CLIENT_SECRET undefined"
+  );
+  invariant(
+    process.env.DISCORD_CALLBACK_URL,
+    "env var DISCORD_CALLBACK_URL undefined"
+  );
+  invariant(process.env.COOKIE_SECRET, "env var COOKIE_SECRET undefined");
+
+  passport.use(
+    new DiscordStrategy(
+      {
+        clientID: process.env.DISCORD_CLIENT_ID,
+        clientSecret: process.env.DISCORD_CLIENT_SECRET,
+        callbackURL: process.env.DISCORD_CALLBACK_URL,
+        scope: ["identify", "connections"],
+      },
+      function (_accessToken, refreshToken, loggedInUser, cb) {
+        upsertUser({ loggedInUser, refreshToken })
+          .then((user) => {
+            return cb(null, {
+              id: user.id,
+              discordId: user.discordId,
+              discordAvatar: user.discordAvatar,
+            });
+          })
+          .catch((err) => cb(err));
+      }
+    )
+  );
+
+  passport.serializeUser(function (user, done) {
+    done(null, user);
+  });
+
+  passport.deserializeUser(function (user, done) {
+    // @ts-expect-error it is guaranteed it's of a certain shape without an extra check
+    done(null, user);
+  });
+
+  app.use(cookieParser());
+  app.use(
+    session({
+      secret: process.env.COOKIE_SECRET,
+      resave: true,
+      saveUninitialized: true,
+    })
+  );
+  app.use(passport.initialize());
+  app.use(passport.session());
+  app.post("/auth/discord", passport.authenticate("discord"));
+  app.get(
+    "/auth/discord/callback",
+    passport.authenticate("discord", {
+      failureRedirect: "/login",
+      // TODO: fix for prod + redirect to same page
+      successRedirect: "http://localhost:3000",
+    })
+  );
+}
diff --git a/server/index.ts b/server/index.ts
index d97adde27..9e4bf3f93 100644
--- a/server/index.ts
+++ b/server/index.ts
@@ -3,6 +3,7 @@ import express from "express";
 import compression from "compression";
 import morgan from "morgan";
 import { createRequestHandler } from "@remix-run/express";
+import { setUpAuth } from "./auth";
 
 const MODE = process.env.NODE_ENV;
 const BUILD_DIR = path.join(process.cwd(), "server/build");
@@ -17,14 +18,32 @@ app.use(express.static("public", { maxAge: "1h" }));
 app.use(express.static("public/build", { immutable: true, maxAge: "1y" }));
 
 app.use(morgan("tiny"));
+
+try {
+  setUpAuth(app);
+} catch (err) {
+  console.error(err);
+}
+
+function userToContext(req: Express.Request) {
+  return { user: req.user };
+}
+
 app.all(
   "*",
   MODE === "production"
-    ? createRequestHandler({ build: require("./build") })
+    ? createRequestHandler({
+        build: require("./build"),
+        getLoadContext: userToContext,
+      })
     : (req, res, next) => {
         purgeRequireCache();
         const build = require("./build");
-        return createRequestHandler({ build, mode: MODE })(req, res, next);
+        return createRequestHandler({
+          build,
+          mode: MODE,
+          getLoadContext: userToContext,
+        })(req, res, next);
       }
 );