public void GivenConfirmedUserWhenLoginThenUserCanAuthenticate(string providerName)
{
// arrange
var testClass = this.WithProvider(providerName);
var testUser = testClass.WithConfirmedUser().Value;
// act
var result = testClass.ValidateUser(testUser.UserName, testUser.Password);
// assert
Assert.That(result, Is.True);
}