Alternative or backup email

Hi, it would be nice to have a field for alternative email address in case user for any reason loose access to primary email.

User could be able to login with primary or alternative email, notifications could be sent to only primary email or both, and user could choose to switch primary and secondary email address if access is lost on the primary email.

I am kindly requesting this feature after reading horror stories related to gmail and google bots randomly locking google accounts.

I haven’t tried to change email address, I am not sure if access to old email address is required when changing email address.