Link to Teams from another Application WITH credentials

We have a custom application that is used both in the web browser and mobile devices.  I need to add a link to open MS Teams either in the browser or the desktop client/app.  But I also need to pass along the user's credentials so that users aren't prompted with yet another "sign in here" window. 

I'm using "https://teams.microsoft.com/_?whr={tenantname}.com".  This works so long as you are using a web browser, but does not pass along credentials.  BUT when using a mobile device, the browser window opens, but tells the user that it's not supported and they need to download the app.