docs: public Credentials getSafe(){
          Credentials safeCreds = new Credentials(this);
          safeCreds.meta_remove(PASSWORD_KEY);
          safeCreds.meta_remove(AUTH_TOKEN_KEY);
          safeCreds.meta_remove(AUTH_TOKEN_EXPIRE_KEY);
          safeCreds.meta_remove(VALIDATION_KEY);
          safeCreds.meta_remove(PUSH_MESSAGING_KEY);
          safeCreds.meta_remove(RECOVERY_TOKEN_KEY);
          return safeCreds;
      }