code: def get_user_orcid(self, user_id, password, redirect_uri):
          
          response = self._authenticate(user_id, password, redirect_uri,
                                        '/authenticate')
  
          return response['orcid']
docs: Get the user orcid from authentication process.
  
          Parameters
          ----------
          :param user_id: string
              The id of the user used for authentication.
          :param password: string
              The user password.
          :param redirect_uri: string
              The redirect uri of the institution.
  
          Returns
          -------
          :returns: string
              The orcid.