As an aside, if you actually log in to Google Chrome itself, you will automatically be logged in to the Chrome Hangouts App using the same account when you activate the control to bring up the window.
I can't recall the last time I logged in to the Hangouts App since I'm always logged in to Chrome itself.
Brian - Windows 10 Pro, 64-Bit, Version 1809, Build 17763
Here is a test to find out whether your mission in life is complete. If you’re alive, it isn’t.
~ Lauren Bacall