public async Task ItSignsInTheNewUserIfRegisteringFromTheWebApplication()
{
await userRegisterer.RegisterUser(newUser);
signInManagerMock.AssertWasCalled(mock => mock.SignInAsync(
Arg <ApplicationUser> .Matches(user => user.Email == newUser.EmailAddress && user.UserName == newUser.UserName),
Arg <bool> .Is.Equal(false),
Arg <bool> .Is.Equal(false)));
}