Get user role by user field

Question

how can I access to my user role thanks to my user custom field ?

I have an user field called "custField" and it's value (example : 123456). I need to check all users that have "123456" as value.

Then, I need to check if this user as the role "director".

But I don't know how to access role thanks to another field.

EDIT :

See this loop :

foreach($retraitDoublons as $valUnique){
  $users = \Drupal::entityTypeManager()->getStorage('user')
    ->loadByProperties(['field_custVal' => $valUnique]);
  $user = reset($users);
  $user_has_role = $user && $user->hasRole('directeur_cr_');

  dump($user);
  dump($user_has_role);

  echo $valUnique . "<hr>";
}

Answer 1

Similar to this question:

I have an user field called "custField" and it's value (example : 123456). I need to check all users that have "123456" as value:

$users = \Drupal::entityTypeManager()->getStorage('user')
  ->loadByProperties(['field_custField' => '123456']);

Then, I need to check if this user:

$user = reset($users);

has the role "director":

$user_has_role = $user && $user->hasRole('director');