Handled the case of missing user (#1367)

server/services/store/mattermostauthlayer/mattermostauthlayer.go

@@ -436,7 +436,13 @@ func (s *MattermostAuthLayer) userWorkspacesFromRows(rows *sql.Rows) ([]model.Us
 			names := []string{}
 
 			for _, userID := range userIDs {
-				names = append(names, users[userID].Username)
+				user, exists := users[userID]
+				username := userID
+				if exists {
+					username = user.Username
+				}
+
+				names = append(names, username)
 			}
 
 			rawUserWorkspaces[i].Title = strings.Join(names, ", ")

webapp/src/pages/dashboard/dashboardPage.scss

@@ -109,4 +109,9 @@
     flex-direction: column;
     gap: 40px;
     //background: url('../../../static/onboardingBg.jpg');
+
+    .text-heading2 {
+        overflow: hidden;
+        text-overflow: ellipsis;
+    }
 }