Grant cluster administration privileges to a user.

        :param username: the username to grant privileges to
        :type username: str

        .. note:: Only a cluster administrator can create/drop databases
            and manage users.

def grant_admin_privileges(self, username):
        """Grant cluster administration privileges to a user.

        :param username: the username to grant privileges to
        :type username: str

        .. note:: Only a cluster administrator can create/drop databases
            and manage users.
        """
        text = "GRANT ALL PRIVILEGES TO {0}".format(quote_ident(username))
        self.query(text, method="POST")