def authenticate(self, username, api_key, auth_token=None):
        auth_endpoint = '/'.join((self.endpoint, 'v1',
                                  self.account_id, 'auth'))
        auth = QueueAuth(auth_endpoint, username, api_key,
                         auth_token=auth_token)
        auth.auth()
        self.auth = auth
Returns a list of Gerber parameter command with an optional
dataset/ETHPy150Open softlayer/softlayer-python/SoftLayer/managers/messaging.py/MessagingConnection.authenticate--crossover with--dataset/ETHPy150Open boldport/pcbmode/pcbmode/utils/gerber.py/Gerber._getParamCommand