Redirect with data object. Here is the code. Presntly it was not working
{ "$schema": ".../schemas/adaptive-card.json", "type": "AdaptiveCard", "version": "1.0", "body": [ { "type": "TextBlock", "spacing": "none", "text": "Click below to authenticate", "isSubtle": false, "wrap": true } ], "actions": [ { "type": "Action.Submit", "title": "Click me for signin", "data": { "email":"[email protected]", "msteams": { "type": "signin", "value": "my-lambda-function-url" } } } ] }