feat(auth): setup login and sign up and can use email or username

backend/src/utils/auth.utils.ts

@@ -1,6 +1,12 @@
 import { betterAuth, type User } from "better-auth";
 import { drizzleAdapter } from "better-auth/adapters/drizzle";
-import { admin, apiKey, jwt, username } from "better-auth/plugins";
+import {
+	admin,
+	apiKey,
+	customSession,
+	jwt,
+	username,
+} from "better-auth/plugins";
 import { eq } from "drizzle-orm";
 import { db } from "../db/db.controller.js";
 import * as rawSchema from "../db/schema/auth.schema.js";
@@ -21,15 +27,52 @@ export const auth = betterAuth({
 	baseURL: process.env.URL,
 	database: drizzleAdapter(db, {
 		provider: "pg",
+		schema,
 	}),
+	user: {
+		additionalFields: {
+			role: {
+				type: "string",
+				required: false,
+				input: false,
+			},
+			lastLogin: {
+				type: "date",
+				required: false,
+				input: false,
+			},
+		},
+	},
 	plugins: [
 		jwt({ jwt: { expirationTime: "1h" } }),
 		apiKey(),
 		admin(),
-		username(),
+		username({
+			minUsernameLength: 5,
+			usernameValidator: (username) => {
+				if (username === "admin") {
+					return false;
+				}
+				return true;
+			},
+		}),
+		customSession(async ({ user, session }) => {
+			const roles = await db
+				.select({ roles: rawSchema.user.role })
+				.from(rawSchema.user)
+				.where(eq(rawSchema.user.id, session.id));
+			return {
+				roles,
+				user: {
+					...user,
+					//newField: "newField",
+				},
+				session,
+			};
+		}),
 	],
 	trustedOrigins: allowedOrigins,
-	// email or username and password.
+
 	emailAndPassword: {
 		enabled: true,
 		minPasswordLength: 8, // optional config