Application Connector supports passing the access token directly in the request.

Passing the access token

If the user is already authenticated to the target API, the access token can be passed in a custom Access-token header. The value of the header is of the Bearer {TOKEN} or Basic {TOKEN} form. If Application Connector detects that the custom header is present, instead of performing authentication steps, it removes the Access-token header and passes the received value in the Authorization header.