portion of code to create GF coupons based on user registration

gf_create_coupon.php

function bto_create_builder_coupon($user_id) { // need to pass user data to this function
	if( is_callable( 'gf_coupons' ) ) {
		    $user = get_user_by( 'id', $user_id );
		    //$meta['gravityForm']      = $form_id ? $form_id : 0;
		    $form_id = '16'; // would like this to be 0. Have tried 0, '0', and specific form id. Nothing is working properly.
		    $meta['couponName']       = $user->user_login . date('M d, Y');
		    //$coupon_code = substr($user->user_firstname,0, 1) . substr($user->user_lastname, 0, 3) . date('ymd');
		    $meta['couponCode']       = strtoupper($user->user_login . date('ymd'));
		    $meta['couponAmountType'] = 'percentage';
		    $meta['couponAmount']     = 100;
		    $meta['startDate']        = date('m/d/y');
		    $meta['endDate']          = false;
		    $meta['usageLimit']       = 10;
		    $meta['isStackable']      = false;
		    $meta['usageCount']       = 0;
		    gf_coupons()->insert_feed( $form_id, true, $meta );
	    } else {
		    GFCouponsData::update_feed( 0, $form_id, true, $meta );
	    }

}