/GetDBName return database name.

NewDeviceInfo create a device information.

Initialize firebase app.

Initialize access auth firebase service.

NewPhoneNumber create a new user.

NewUser create a new user.

ErrCannotBeDeleted cannot be deleted.

ErrExceededDailyActionsLimit.

ErrInvalidEntity invalid entity.

ErrNotFound not found.

ErrTokenInvalidOrExpired.