Restrict Content Pro Automated Discount Creation

rcp_discount.php

function gre_rcp_discount_offer( $entry, $form ) {

    $exp_date = date("Y-m-d", strtotime("+ 2 day"));
    $code = substr(str_shuffle(MD5(microtime())), 0, 10);
   
    $discount = new RCP_Discounts();
    $args = array(
        'name'           => 'Welcome Offer',
        'description'    => 'FL Sales OTO: '.$code,
        'amount'         => '30.00',
        'status'         => 'active',
        'unit'           => 'flat',
        'code'           => $code,
        'expiration'     => $exp_date,
        'max_uses'          => 1,
        'use_count'      => '0',
        'subscription_id'=> 4,
    );
   
    $add = $discount->insert( $args );
   
    if ( is_wp_error( $add ) ) {
        rcp_log( sprintf( 'Error creating new discount code: %s', $add->get_error_message() ) );
        wp_die( $add );
    }

    if ( $add ) {
        $_POST['input_10'] = $code;
        rcp_log( sprintf( 'Successfully added discount #%d.', $add ) );
    } else {
        rcp_log( 'Error inserting new discount code into the database.' );
    }
}