Update Phone Number

I have an account created from Google Provider. Then I need to update the phone number for this account. The method to update the phone number we need to input the password as well. However, since the account was registered from Google provider, we did not provide any password. So what is the password of the account then if there is no password provided during regestired?

TL;DR

The user is trying to update the phone number for an account created from the Google Provider. The issue is that they need to input a password to update the phone number, but they didn't provide a password during registration. The solution is not provided in the thread.