code: def username(self, default=None):
          '''
          Return the full, given, or family name if set.
          '''
          if self.lis_person_name_given:
              return self.lis_person_name_given
          elif self.lis_person_name_family:
              return self.lis_person_name_family
          elif self.lis_person_name_full:
              return self.lis_person_name_full
          else:
              return defaulf username(self, default=None):
          '''
          Return the full, given, or family name if set.
          '''
          if self.lis_person_name_given:
              return self.lis_person_name_given
          elif self.lis_person_name_family:
              return self.lis_person_name_family
          elif self.lis_person_name_full:
              return self.lis_person_name_full
          else:
              return default
docs: Return the full, given, or family name if set.