public void When__UserStore_Add_Login__Expect__User_Param_Null_Exception() { Assert.ThrowsAsync(typeof(ArgumentNullException), async() => { UserLoginInfo login = new UserLoginInfo("Google", "E5A1F645-088A-4984-A7CE-CA1D48D30F92"); await _userStore.AddLoginAsync(null, login).ConfigureAwait(false); }, "Exception not thrown"); }