Register/Login using only phone number?

Does anybody know how WP could be configured to use only a person’s phone number as credentials?

The flow would be as such;

User enters number
..Receives a PIN
Enter the PIN
.. Assigns a password to the account.

Any help would be greatly appreciated.

you can change the type of data used for signing in for the username portion, assuming it’s data that you have stored about the user (either in the main user table or usermeta). there would still need to be a password, but that in theory could also be mapped to the same data (phone number in your case)

the issue of it being secure is separate, however, because phone numbers are easy enough to get.