<?php 
//controllers/users/collection.php

function collection($f3){
    $collection = $f3->get('DB')->users;

    $document = $collection->findOne();
	
    if(!$document){
        $root = [
            'email'=>'xxxxx',
            'name'=>'xxxxx',
            'password'=>'xxxxxx',
            'role'=>'xxxxx',
            'thumb'=>'xxxxxx',
            'info'=>'xxxxxx',
            'video'=>'xxxxxx',
            'date'=>'xxxxxx'
        ];

        $collection->insertOne($root);
    }
}

<?php
//controllers/login.php

function login($f3){
    require_once('setting.php');
    require_once('controllers/users/collection.php');
    collection($f3);

    $f3->mset([
        'appName'=>$setting['siteTitle'], 
        'title'=>'ទំព័រ​ដើម', 
        'date'=>$setting['date'],
        'message'=>$setting['message']
    ]);

    $view=new View;
    echo $view->render('views/login.php');
}

GitHub: https://github.com/Sokhavuth/multimedia_

Heroku: https://khmerweb-multimedia1.herokuapp.com/