Configuring Doctrine ORM Entity Manager with Aura.Di

Common.php

<?php
$di->set('entity_manager', function () {
    // paths
    $paths = array(__DIR__);
    $isDevMode = false;
    // the connection configuration
    $dbParams = array(
        'driver'   => 'pdo_mysql',
        'user'     => getenv('username'),
        'password' => getenv('password'),
        'dbname'   => getenv('dbname'),
    );

    $config = \Doctrine\ORM\Tools\Setup::createAnnotationMetadataConfiguration($paths, $isDevMode);
    $entityManager = \Doctrine\ORM\EntityManager::create($dbParams, $config);
    return $entityManager;
});

// $entity_manager = $di->get('entity_manager');

iirc what I tried to do was something like

$di->params['Doctrine\DBAL\Connection']['params'] = 
$di->params['Doctrine\DBAL\Connection']['driver'] = 'pdo_mysql';
$di->params['Doctrine\DBAL\Connection']['config']
$di->params['Doctrine\DBAL\Connection']['eventManager']
        // , Driver $driver, Configuration $config = null, EventManager $eventManager = null =
$di->params['Doctrine\ORM\EntityManager']['conn']
$di->params['Doctrine\ORM\EntityManager']['config']
$di->params['Doctrine\ORM\EntityManager']['eventManager']

but this is very complicated and may be I ended up at the above gist itself if I am correct. There are a lot of experimental projects that I was unable to find :( . In case I came across will update.