WooCommerce: Block admistrator from WC Login form

wc-block-admin-from-login-form

add_filter( 'woocommerce_login_credentials', 'prefix_check_admin_login' );
function prefix_check_admin_login( $credentials ) {
	if ( is_email( $credentials['user_login'] ) ) {
		$user = get_user_by( 'email', $credentials['user_login'] );
	} else {
		$user = get_user_by( 'login', $credentials['user_login'] );
	}

	// If the user is administrator or has any rights that you want
	if ( user_can( $user, 'administrator' ) ) {
		// Invalidate the username to symbols
		$credentials['user_login'] = '-_-';
	}

	return $credentials;
}