auto assign username upon registration

lib/api/controllers/users/postUser.ts

@@ -72,6 +72,9 @@ export default async function postUser(
   });
 
   if (!checkIfUserExists) {
+    const autoGeneratedUsername =
+      "user" + Math.round(Math.random() * 1000000000);
+
     const saltRounds = 10;
 
     const hashedPassword = bcrypt.hashSync(body.password, saltRounds);
@@ -85,7 +88,9 @@ export default async function postUser(
       const user = await prisma.user.create({
         data: {
           name: body.name,
-          username: (body.username as string).toLowerCase().trim(),
+          username: emailEnabled
+            ? autoGeneratedUsername
+            : (body.username as string).toLowerCase().trim(),
           email: emailEnabled ? body.email?.toLowerCase().trim() : undefined,
           password: hashedPassword,
           emailVerified: new Date(),
@@ -121,7 +126,7 @@ export default async function postUser(
         data: {
           name: body.name,
           username: emailEnabled
-            ? undefined
+            ? autoGeneratedUsername
             : (body.username as string).toLowerCase().trim(),
           email: emailEnabled ? body.email?.toLowerCase().trim() : undefined,
           password: hashedPassword,