* Shows "(Deleted User)" instead of long, unreadable UUID in case the user is not found
In case a user is not found, at present unreadable and long UUIDs are shown which kill the look and feel of the application. This patch replaces the UUID with a more explanatory string.
* Update server/services/store/mattermostauthlayer/mattermostauthlayer.go
Co-authored-by: Doug Lauder <wiggin77@warpmail.net>