public void CreateUser_Call_Create_User_If_Validation_Checks_Where_Successful()
{
var user = new User();
GivenAllValidationCheckAreSuccessful();
var result = _sut.CreateUser(user);
Received.InOrder(() =>
{
_credentialService.UserExists(Arg.Any <User>());
_credentialService.CheckUserCredentials(Arg.Any <User>());
_userRepository.CreateUser(Arg.Any <User>());
});
result.ShouldBeOfType <ApiResult>();
result.Success.ShouldBeTrue();
}