code: def get_users(self, full_name=None, email=None, username=None):
          
          data = {}
          if full_name:
              data['full_name_contains'] = full_name
          if email:
              data['email'] = email
          if username:
              data['username'] = username
          return self._get_collection('/users', data)
docs: Send GET request to /users for users with optional full_name, email, and/or username filtering.
          :param full_name: str name of the user we are searching for
          :param email: str: optional email to filter by
          :param username: str: optional username to filter by
          :return: requests.Response containing the successful result