Set up @Auth

auth.config.ts

@@ -0,0 +1,33 @@
+import { CredentialsSignin } from '@auth/core/errors'
+import { defineConfig } from 'auth-astro'
+import Credentials from "next-auth/providers/credentials"
+import bcrypt from 'bcrypt'
+
+import db from '@/sequelize'
+
+class InvalidLoginError extends CredentialsSignin {
+  code = "Invalid username/email or password"
+}
+
+export default defineConfig({
+  providers: [
+    // @ts-ignore @auth/core cringe
+    Credentials({
+      credentials: {
+        username: { label: "Username" },
+        password: { label: "Password", type: "password" },
+      },
+      async authorize(credentials) {
+        if (!credentials?.username || !credentials.password) throw new InvalidLoginError()
+
+        const user = await db.models.user.findByPk(credentials.username)
+        if (!user) throw new InvalidLoginError()
+
+        const valid = await bcrypt.compare(credentials.password, user.password)
+        if (!valid) throw new InvalidLoginError()
+
+        return { id: user.username, username: user.username }
+      },
+    }),
+  ],
+})