Creating a new contact record
You can create new \Groundhogg\Contact objects on the fly by passing in an array of parameters. Duplicates will be avoided.
$first_name = $_POST[ 'first' ];
$email = $_POST[ 'email' ];
$contact = new \Groundhogg\Contact( [
'first_name' => $first_name,
'email' => $email,
] );