This hook is used to handle the data before contact is created by the groundhogg.
do_action( 'groundhogg/form/submission_handler/before_create_contact', $args, $meta, $tags, $files, $this );
This hook provides five arguments to work with.
$args: This array contains the basic argument that is required to create contact.
$meta: This array contains a list of the contact meta to add after contact creations.
$tags: This array contains a list of tags to apply to the contact if any control is bound with tags.
$files: This array contains information about any files are attached to the submission.
$this: This contains an object of the Submission_Handler class which can be used to handle the response.