Notify me when credentials for scheduled refresh expire
Today, 10-15 of my scheduled refreshes for both datasets and dataflows failed because the credentials cached in the PowerBI service for SharePoint expired. It took only a few minutes to renew those credentials, but several hours to re-refresh the dataflows (they all hit the same source, and time out if fired at once. They are scheduled for staggered refresh). If I had been notified by email before the refreshes failed instead of after, I could have easily renewed the credentials in question.
Note that my user account/password did not change. The access token stored by PBI merely expired.