Salman Ahmed f82ed64aa7 Fix participant panel null user test no longer functioning properly
I guess the changes that involved `MultiplayerTestScene` having a test
user lookup cache caused this test case to false-pass silently.

Added an explicit assert which ensures the added user indeed has a null
`User` value.
2021-08-16 09:07:00 +03:00
..
2021-08-03 15:02:18 +03:00
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