/*
 WSA allows user role based bidding

Add to your functions.php
*/
add_filter( 'woocommerce_simple_auctions_before_place_bid_filter' , 'wsa_check_user_role' );
function wsa_check_user_role() {
	$current_user = wp_get_current_user();	
	if ( in_array ( 'subscriber', $current_user->roles ) ){
		wc_add_notice( esc_html__('You need user role that allows bidding. Your current role is "subscriber" which does not allow bidding.', 'wc_simple_auctions'), 'error' );
		return FALSE;
	} else {
		// user can place a bid
		return TRUE;
	}
}