I came across this article published just 8 days ago (https://docs.microsoft.com/en-us/microsoftteams/platform/concepts/build-and-test/deep-links). One of the sections is labeled 'Deep Linking to a Chat'. So now I am trying to get this to work.
My idea is to have a button that when pressed, opens up a message between the current user, and another set email. As seen in the link, the deeplink needs to be in the following format: https://teams.microsoft.com/l/chat/0/0?users=<user1>,<user2>
Going with that I wrote the following line of code, however I am getting an error:

I know this may a new deeplinking ability, however if you have any idea, let me know.
Thanks, Matt