TeraWallet support

In order for referral coupons to work with Wallet Coupons add-on for TeraWallet, just add below code to the functions.php file:

add_action( 'gens_generate_user_coupon', function($couponId) { update_post_meta( $couponId, '_is_coupon_cashback', 'yes' ); }, 10, 1);