This causes the trigger service to send a Meshblu message to the flow to tell it to trigger. If no authentication information is passed, it will send the message as the identity of the Trigger Service.

Additionally, any POST data sent will be made available to the flow

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Check the Permissions

In order to activate the trigger, the trigger service's UUID must be in the flow's message.from whitelist. Generally, the Octoblu Designer will manage the Whitelist for the user. See the Meshblu whitelist documentation for more information.