GetSkills.Controllers.ManageController.RemoveLogin C# (CSharp) Method

        public async Task<ActionResult> RemoveLogin(string loginProvider, string providerKey)
        {
            ManageMessageId? message;
            var result = await UserManager.RemoveLoginAsync(User.Identity.GetUserId(), new UserLoginInfo(loginProvider, providerKey));
            if (result.Succeeded)
            {
                var users = await UserManager.FindByIdAsync(User.Identity.GetUserId());
                if (users != null)
                {
                    await SignInManager.SignInAsync(users, isPersistent: false, rememberBrowser: false);
                }
                message = ManageMessageId.RemoveLoginSuccess;
            }
            else
            {
                message = ManageMessageId.Error;
            }
            return RedirectToAction("ManageLogins", new { Message = message });
        }

        public void ManageController_RemoveLogin_Test()
        {
            // Initialization
            ManageController ctl = new ManageController();
            string provider = "Admin";
            string key = "888888";

            // To test if it is null
            var result = ctl.RemoveLogin(provider,key);
            Assert.IsNotNull(result);
        }