refactor: update user creation to use email parameter directly instead of userByEmail

Author: tomast1337

server/src/user/user.service.ts

@@ -49,7 +49,7 @@ export class UserService {
     );
 
     const user = await this.userModel.create({
-      email: userByEmail,
+      email: email,
       username: emailPrefixUsername,
       publicName: emailPrefixUsername,
     });