public void When__UserStore_Remove_Login__Expect__User_Param_Null_Exception()
{
Assert.ThrowsAsync(typeof(ArgumentNullException), async() =>
{
UserLoginInfo login = new UserLoginInfo("Yahoo", "341113DF-9091-4750-A2DD-9A1B56A8FCDC");
await _userStore.RemoveLoginAsync(null, login).ConfigureAwait(false);
}, "Exception not thrown");
}