public async Task testConfirmed()
        {
            var options = new DbContextOptionsBuilder <ApplicationDbContext>()
                          .UseInMemoryDatabase(databaseName: "testConfirmedStud")
                          .Options;

            using (var context = new ApplicationDbContext(options))
            {
                context.Students.Add(student1);
                context.Students.Add(student2);
                context.Users.Add(appU1);
                context.Users.Add(appU2);
                context.Users.Add(appU3);
                context.SaveChanges();
            };

            using (var context = new ApplicationDbContext(options))
            {
                var service = new StudentController(context);
                var result  = await service.Confirmed("1");

                Assert.IsTrue(result);
            }
        }