Navigating to pop-up without a mouse
(By way of background I have been helping a local blind child learn coding. He's switching schools from a Windows based school to a Mac based school so I am trying to familiarise myself with VoiceOver on the Mac.)
When using VoiceOver and Xcode to write Swift into a new Swift Playground a pop-up window appeared requesting my password.
How might I navigate to the pop-up without using a mouse?
I tried the arrow keys, tab, with and without ⌘, and ⌘ `, all to no avail.