code: def validate_full_name(self, full_name, timeout=-1):
          
          uri = self.URI + '/validateUserName/' + full_name
          return self._client.create_with_zero_body(uri=uri, timeout=timeout)
docs: Verifies if a fullName is already in use.
  
          Args:
              full_name:
                  The fullName to be verified.
              timeout:
                  Timeout in seconds. Wait for task completion by default. The timeout does not abort the operation in
                  OneView, just stops waiting for its completion.
  
          Returns: True if full name is in use, False if it is not.