Adding Contact in infusion

        $contact = new Infusionsoft_Contact();
        $contact->FirstName = $first_name;
        $contact->Email = $email;
        $contact->Address2Street1 = $add;
        $contact->City = $city;
        $contact->Country = $cou;
        $contact->ZipFour1 = $zip;
        $contact->Phone1 = $mobile;
        $contact->save();