Ninja Forms AWeber: Suppress Errors

functions.php

/* 
 * Submit form even if user is already subscribed to AWeber List
 *
 * @param $msg - current message from Ninja Forms for AWeber
 * @param $error_code - null, placeholder for when AWeber gets error codes
 * @param $error_message - original message from AWeber
 * @param $subscriber - array of info about the subscriber submitted via form 
 * -- nb the form's ID can be found in $subscriber['form_id'] 
 * @param $list_id the list ID
 */
function nf_aweber_ignore_specific_error( $show, $error_code, $error_message, $subscriber, $list_id ){
	if( strpos( $error_message, 'Subscriber already subscribed' ) !== false ){
		$show = false;
	}
	return $show;
}
add_filter( "ninja_forms_aweber_show_errors", "nf_aweber_ignore_specific_error", 10, 5 );

/*
 * Suppress ALL errors on form id=5
 */ 
function nf_aweber_suppress_errors_for_form( $show, $error_message, $error_code, $subscriber, $list_id ){
	if( isset( $subscriber['form_id'] ) && 5 == intval( $subscriber['form_id'] ) ){
		$show = false;
	}
	return $show;
}
add_filter( 'ninja_forms_aweber_show_errors', 'nf_aweber_suppress_errors_for_form', 10, 5 );