How to locate mui snackbar message?

[MMalziotti]

I would like to test the display of the "Credenziali errate" message if I enter incorrect credentials in my login form. 

What kind of locator (https://www.selenium.dev/documentation/webdriver/elements/locators/) do I use? And how do I identify the MUI Snackbar (https://mui.com/material-ui/react-snackbar/)?

Thanks,

Marco.

P.S. Snackbar disappears after 1 second!