Duplicate users


please find attached File.

I want to validate for duplicate user at the time of signup.

In the Doctor main page I want to  Count no of appointments by formula- Clinic start time+Clinic End time/ Duration(in doctor entity).

and in Appointment page One user one appointment till 2 days.

Plz Help


Community GuidelinesBe kind and respectful, give credit to the original source of content, and search for duplicates before posting.