Is it possible to use Web Connection authentication in the HTTPCaller transformer to access ArcGIS Online REST APIs without additional steps to obtain a token?

I also have this question! It looks like no to me-- at least, when I try I am just getting "Token Required" responses

That was really helpful @sanaeatsafe​ I hadn't seen that on the AGOL Web Connection before!

Further to that though, I have a related question with the ArcGIS Portal Web Connections and tokens.

Some other ArcGIS REST API calls require the token to be uploaded in the body of the request (rather than header or query string). Do you know if it's possible to use the Web Connection to request a token and expose it as an attribute within a workspace?

The call in particular I am trying to make is a geoprocessing tool to create a print-map (like you would within an application).

https://developers.arcgis.com/rest/services-reference/enterprise/exportwebmap-specification.htm

This is quite cumbersome, as the token must be specified within the JSON request for each layer which makes up the map. The Web Connection works in order to execute the Geoprocessing tool itself, but doesn't provide the correct authentication to access the layers when executing that tool.

Is there a way to use the Web Connection to retrieve a token within the workspace?

I'm stuck at trying to retrieve a token like I normally would with ArcGIS Online, as this organisation uses SAML, and I can't seem to get through the separate stages which the Web Connection handles - looping you through the corporate identity provider.

Thanks