Work is continuing on this highly requested feature. Please see the roadmap for status here: https://www.microsoft.com/microsoft-365/roadmap?filters=Microsoft%20Teams&searchterms=65332.
An error occurred while saving the commentSebastian commented
I would like this API very much. There is a PowerShell module (MicrosoftTeams), which allows you to connect to your Teams (in some way), but it looks like it is just to manage your teams and groups.
What I would use it for is to "post" motivational quotes (new ones) each day. I've created a script to change the message on Skype for Business, but now I'm switching to teams.