docs: DbxAuthFinish withUrlState(/*@Nullable*/ String urlState) {
          if (this.urlState != null) {
              throw new IllegalStateException("Already have URL state.");
          }
  
          DbxAuthFinish result =  new DbxAuthFinish(accessToken, expiresIn, refreshToken, userId,
                  teamId, accountId, urlState);
          result.setIssueTime(issueTime);
  
          return result;
      }