Drop a user from InfluxDB.

        :param username: the username to drop
        :type username: str

def drop_user(self, username):
        """Drop a user from InfluxDB.

        :param username: the username to drop
        :type username: str
        """
        text = "DROP USER {0}".format(quote_ident(username), method="POST")
        self.query(text, method="POST")