https://cloud.google.com/dialogflow/cx/docs/concept/integration/dialogflow-messenger
From this document i understan dialogflow cx messenger integration supports OAuth 2.0 user authentication.
But i need other kind of auth mechanism. like client (bot) authenticates itself without user interation to connect with dialogflow cx agent.
I found something similar my expectation in microsoft copilot studio called direct line authentication. Is similar kind of web channel authentication available in google especially for dialogflow CX messenger integration.
Here is link for microsoft direct line auth document: https://learn.microsoft.com/en-us/microsoft-copilot-studio/configure-web-security
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