Dialogflow integration with teams - Extract user information

We are trying to integrate Dialogflow chatbot with Microsoft Teams. We followed this tutorial (https://github.com/GoogleCloudPlatform/dialogflow-integrations/tree/master/skype)
We got to a point where we’re able to send text-based basic intent mapped questions, and they’re working flawlessly.

Is there a way to extract user information out of Teams?

For example, in the Welcome Intent, instead of bot saying “Hello user”, is there a way to make it say “Hello John”?

A little bit of research led us to this (https://github.com/GoogleCloudPlatform/dialogflow-integrations/issues/37#issuecomment-647927403) but we find it a little bit confusing. Are we supposed to develop a method to handle incoming requests within dialoglow-integration/server.js? If so, where should we look for the said user information? Any pointers will help.

TIA.