Hi There,
I just want to ask if possible to add a new field in the user class with duplicate entry validation.
Basically, I want to achieve I want to create a user registration and add a new field something like a telephone number. And during registration, I want to check if the telephone number already exists. If yes registration will fail and there will be a error code that says the telephone number is duplicated, Is that possible?
Warm Regards
Armin