docs: public static AccessToken createFromExistingAccessToken(String accessToken, Date expirationTime,
              Date lastRefreshTime, AccessTokenSource accessTokenSource, List<String> permissions) {
          if (expirationTime == null) {
              expirationTime = DEFAULT_EXPIRATION_TIME;
          }
          if (lastRefreshTime == null) {
              lastRefreshTime = DEFAULT_LAST_REFRESH_TIME;
          }
          if (accessTokenSource == null) {
              accessTokenSource = DEFAULT_ACCESS_TOKEN_SOURCE;
          }
  
          return new AccessToken(accessToken, expirationTime, permissions, null, accessTokenSource, lastRefreshTime);
      }