public function signupWithEmptyFields(FunctionalTester $I)
{
$I->see('Signup', 'h1');
$I->see('Please fill out the following fields to signup:');
$I->submitForm($this->formId, []);
$I->seeValidationError('Username cannot be blank.');
$I->seeValidationError('Email cannot be blank.');
$I->seeValidationError('Password cannot be blank.');
}