On the 18th day of the 25 days of flows, we will learn how to use the Adaptive Cards Designer at this link https://adaptivecards.io/designer/ to create simple, and yet rich adaptive cards in Teams. Adaptive Cards adjust to their host, so whether you're using the dark version of Teams or the light one, it will look perfect!
Hindsight notes: When selecting the library on SharePoint, if you want to find the photos also on SharePoint, use the Shared Documents (Documents) folder, but drill down a step into the sub-folder for the Teams instance where you'd like to keep the file.
More on Adaptive Cards:
https://adaptivecards.io/designer/
More on Microsoft Teams:
https://docs.microsoft.com/microsoftteams/adopt-microsoft-teams-landing-page
More on the Office 365 Users Connector:
https://docs.microsoft.com/connectors/office365users/
The Power Apps app will be available in the Power Apps community on December 26.
Enjoy and happy holidays,
Audrie