The "My Tweeps" app shows a Canvas App connected to 2 data sources, where the user doesn't need to log in to each data source, as per the #PowerApps Challenge.
This app is connected to CDS (or Dynamics 365) Contacts entity and Twitter. It allows the user to search or browse through their list of contacts, and select a contact to view that person's Twitter feed. I decided to use this challenge to learn how to use the PowerApps Twitter connector. The Twitter gallery is filtered to show the tweets by the Twitter handle (custom field) on the Contact record in CDS.
