ultimatemember/includes/core/um-actions-wpadmin.php

<?php
	
	/***
	***	@checks if user can access the backend
	***/
	function um_block_wpadmin_by_user_role() {
        if ( is_admin() && ! defined('DOING_AJAX') && um_user( 'ID' ) && ! um_user( 'can_access_wpadmin' ) && ! is_super_admin( um_user('ID') ) ) {
			um_redirect_home();
		}
	}
	add_action( 'init', 'um_block_wpadmin_by_user_role', 99 );
	
	/***
	***	@hide admin bar appropriately
	***/
	function um_control_admin_bar( $content ){
		
		if( is_user_logged_in() ){
			
			if ( um_user('can_not_see_adminbar') ){
				return false;
			}

			return true;
		}

		return $content;
	}
	add_filter( 'show_admin_bar' , 'um_control_admin_bar', 9999, 1 );
		
	/***
	***	@fix permission for admin bar
	***/
	function um_force_admin_bar() {
		um_reset_user();
	}
	add_action( 'wp_footer', 'um_force_admin_bar' );