How to Save Credentials for users in Website Apps added to Teams Channels

We have 4 websites that our Employees use often.  In Chrome or Edge, they can save their passwords, however, when I add these same websites as a Website App to a Teams Channel, they have to type in their user IDs and passwords each time, which is forcing everyone to stop using it and instead go back to the browser.

Can Teams store these passwords in the app? This would get Teams used a lot more if it could as we're trying to offer Teams as an All-In-One solution for all things SharePoint etc.