Upserts a permission for a user.

        :param str user_link:
            The link to the user entity.
        :param dict permission:
            The Azure Cosmos user permission to upsert.
        :param dict options:
            The request options for the request.

        :return:
            The upserted permission.
        :rtype:
            dict

def UpsertPermission(self, user_link, permission, options=None):
        """Upserts a permission for a user.

        :param str user_link:
            The link to the user entity.
        :param dict permission:
            The Azure Cosmos user permission to upsert.
        :param dict options:
            The request options for the request.

        :return:
            The upserted permission.
        :rtype:
            dict

        """
        if options is None:
            options = {}

        path, user_id = self._GetUserIdWithPathForPermission(permission, user_link)
        return self.Upsert(permission,
                            path,
                            'permissions',
                            user_id,
                            None,
                            options)