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add_filter('option_salesking_all_agents_shop_all_customers_setting', function($val){

	$user_id = get_current_user_id();
	if (isset($_COOKIE['salesking_switch_cookie'])){
    	$switch_to = sanitize_text_field($_COOKIE['salesking_switch_cookie']);

    	if (!empty($switch_to) && is_user_logged_in()){
			$udata = get_userdata( get_current_user_id() );
			$name = $udata->first_name.' '.$udata->last_name;

			$agent = explode('_',$switch_to);
			$customer_id = intval($agent[0]);
			$agent_id = intval($agent[1]);
			$agent_registration = $agent[2];
			$udataagent = get_userdata( $agent_id );
            $registered_date = $udataagent->user_registered;

            if ($user_id === $customer_id && $agent_registration === $registered_date){
            	$user_id = $agent_id;
            }
        }
    }

    if ($user_id == 1234){ // replace 1234 with the ID of your agent with full permissions
    	$val = 1;
    }

	return $val;
}, 10, 1);