Access chat in Microsoft Teams after meeting

Is there any way to access chats after a meeting in Microsoft Teams? I have some kind of MS Teams app on my Macbook. I use it to join a MS Teams meeting when I'm invited to one. However, it is not the 'complete' Teams app which also has chat, filesharing and other stuff. I am not part of some company team with a Active Directory account, so I cannot 'log in' to Teams. The app just opens when I click 'Join Meeting' from an invite. So after I wave goodbye and exit the meeting, where to the chats go?