title: Can I use Firebase "Phone Number Authentication" feature for the phone number verification purpose?
body: <p>I am actually using Firebase Google auth for signing in the user and after that, I want to take the basic details of the user into the database which also includes the mobile number of a user, so my question is can use Phone Number Authentication just to verify the mobile number of user (using OTP) and after that I can store it into database?
  Thank You!</p>