Added MatBlazor and list of users

UserService.Test/UnitTest1.cs

@@ -16,7 +16,7 @@ namespace UserService.Test
         [Test]
         public async Task Test1()
         {
-            using var db = new GroupsContext();
+            await using var db = new UserServiceDbContext();
             var user = await db.Users.FirstOrDefaultAsync();
             var secGroup = await db.SecurityGroups.FirstOrDefaultAsync();
             var ous = await db.OrganizationUnits.ToListAsync();
@@ -25,7 +25,7 @@ namespace UserService.Test
             //var testGroup = new SecurityGroup {CommonName = "Test", Parent = ous.Last()};
             //await db.SecurityGroups.AddAsync(testGroup);
             //var testgroup = await db.SecurityGroups.FindAsync(1);
-            //testgroup.Members.Add(new UserMember{MemberId = testgroup.Id, UserId = user.Id});
+            //testgroup.Members.AddAsync(new UserMember{MemberId = testgroup.Id, UserId = user.Id});
             //await db.SaveChangesAsync();
             Assert.Pass();
         }