The ability to show usernames and passwords (even on first entry) for Data Gateway connections.
Scott Thornburg commented
I'll vote for half of this -- please let me see the user name for data sources. Passwords, I'm not so sure about.
Here's the use case I have: my company does quarterly password changes for accounts to production databases where access is via a username / password. In that case, we have no known way within Power BI or gateway administration to determine the user for a given datasource. Recently when our Power BI admin left the company, we were guessing the accounts. Yes, we could maintain the user id outside of Power BI, but why is that necessary?