Use doctrine in entity - php

Question

how can i get doctrine in entity to get permission list?
<?php
namespace App\Entity;
use App\Repository\UserRepository;
use Doctrine\Common\Persistence\Event\LifecycleEventArgs;
use Symfony\Component\Security\Core\User\UserInterface;
use Doctrine\ORM\Mapping as ORM;
use Doctrine\Persistence\ManagerRegistry;
use Symfony\Component\Security\Core\Role\Role;
use Doctrine\Common\Collections\ArrayCollection;
/**
* #ORM\Entity(repositoryClass=UserRepository::class)
* #ORM\HasLifecycleCallbacks()
* #ORM\Table(name="`user`")
*/
class User implements UserInterface
{
private $entityManager;
/**
* #ORM\Id
* #ORM\GeneratedValue
* #ORM\Column(type="integer")
*/
private $id;
/**
* #ORM\Column(type="string", length=180, unique=true)
*/
private $discordId;
/**
* #ORM\Column(type="string", length=180)
*/
private $username;
/**
* #ORM\Column(type="string", length=255, unique=true)
*/
private $email;
/**
* #ORM\Column(type="json")
*/
private $roles = [];
/**
* #ORM\OneToMany(targetEntity=Sites::class, mappedBy="owner", orphanRemoval=true)
*/
private $sites;
/**
* #ORM\PostLoad
* #ORM\PostPersist
*/
public function fetchEntityManager(LifecycleEventArgs $args)
{
$this->entityManager = $args->getEntityManager();
}
public function __construct()
{
$this->sites = new ArrayCollection();
}
public function getId(): ?int
{
return $this->id;
}
public function getdiscordId(): ?int
{
return $this->discordId;
}
public function setdiscordId(string $discordId): self
{
$this->discordId = $discordId;
return $this;
}
public function getUsername(): ?string
{
return $this->username;
}
public function setUsername(string $username): self
{
$this->username = $username;
return $this;
}
public function getEmail(): ?string
{
return $this->email;
}
public function setEmail(string $email): self
{
$this->email = $email;
return $this;
}
/**
* A visual identifier that represents this user.
*
* #see UserInterface
*/
public function getUserIdentifier(): string
{
return (string) $this->username;
}
public function getRoles() :array
{
// get permissions from group
$groupPermissionsRepo = $this->entityManager->getRepository(GroupPermissions::class);
$groupAccessList = $groupPermissionsRepo->getPermissionsForGroup($this->getGroupId());
// create access
$accessList = [];
foreach ($groupAccessList as $access) {
$accessList[] = new Role('ROLE_'.$access);
}
// set default role when group didn't have any access granted
if(count($groupAccessList) == 0)
$accessList[] = new Role('ROLE_USER');
// return access
return $accessList;
}
/**
* #see UserInterface
*/
public function eraseCredentials()
{
// If you store any temporary, sensitive data on the user, clear it here
// $this->plainPassword = null;
}
/**
* #return Collection<int, Sites>
*/
public function getSites(): Collection
{
return $this->sites;
}
public function addSite(Sites $site): self
{
if (!$this->sites->contains($site)) {
$this->sites[] = $site;
$site->setOwner($this);
}
return $this;
}
public function removeSite(Sites $site): self
{
if ($this->sites->removeElement($site)) {
// set the owning side to null (unless already changed)
if ($site->getOwner() === $this) {
$site->setOwner(null);
}
}
return $this;
}
}
While using this code i get only error:
App\Entity\User::fetchEntityManager(): Argument #1 ($args) must be of type Doctrine\Common\Persistence\Event\LifecycleEventArgs, Doctrine\ORM\Event\LifecycleEventArgs given, called in C:\xampp\htdocs\dbshop2\vendor\doctrine\orm\lib\Doctrine\ORM\Event\ListenersInvoker.php on line 84