Keyless.retrieveDataForBackupmethod or the deprecated
Keyless.shared.retrieveDataForBackupmethod. You can store the backup data and backup key to let users restore their account with Keyless.
backupKeythat was saved when the current user was enrolled. You can invoke the
Keyless.enrollFromBackup(backupData: String, backupKey: String)method or the deprecated
Keyless.shared.enrollFromBackup(backupData: String, backupKey: String)method to let the user restore their Keyless data and enroll from backup.
enrollmentDidFinish: keylessID: enrollmentResponse: error:delegate method gets called. In case of errors, prompt the user to try again.