I am willing to validate my users through phone numbers to avoid account duplicates, and have set up some azure function for that purpose. I am now wondering where can I store the phone number in a way where I can easily see if one user already has that phone number when signing them up. Playfab does this with the username and email already, but I wish my users to have :
- A username (Used to login)
- An email (For password recovery)
- A phone number (For verification, only at sign-up or when there are issues)
So I kind of need an "easy" and "cheap" way to iterate through all the already registered phone numbers.
Thanks in advance for any help.