def METHOD_NAME(self):
    hostname = 'host.us-east-1.rds.amazonaws.com'
    port = 3306
    username = 'mySQLUser'
    auth_token = self.client.generate_db_auth_token(
        DBHostname=hostname, Port=port, DBUsername=username
    )
    endpoint_url = 'host.us-east-1.rds.amazonaws.com:3306'
    self.assertIn(endpoint_url, auth_token)
    self.assertIn('Action=connect', auth_token)
    # Asserts that there is no scheme in the url
    self.assertTrue(auth_token.startswith(hostname))