Implement authentication using Passport.js

services/user/findUserByUsername.ts

@@ -0,0 +1,13 @@
+import DBClient from '@/prisma/DBClient';
+
+const findUserByUsername = async (username: string) =>
+  DBClient.instance.user.findFirst({
+    where: { username },
+    select: {
+      id: true,
+      username: true,
+      hash: true,
+    },
+  });
+
+export default findUserByUsername;