docs: def delete_repo(self, auth, username, repo_name):
          """
          Deletes the repository with name ``repo_name`` owned by the user with username ``username``.
  
          :param auth.Authentication auth: authentication object
          :param str username: username of owner of repository to delete
          :param str repo_name: name of repository to delete
          :raises NetworkFailure: if there is an error communicating with the server
          :raises ApiFailure: if the request cannot be serviced
          """
          path = "/repos/{u}/{r}".format(u=username, r=repo_name)
          self.delete(path, auth=auth)