/**
* @param UserInterface $user
* @return array
*/
public function serialize(UserInterface $user)
{
$serialized = ['user_id' => $user->getUserId(), 'email' => $user->getEmail(), 'name' => $user->getName()];
$signedUpAt = $user->getSignedUpAt();
if (null !== $signedUpAt) {
$serialized['signed_up_at'] = $signedUpAt->getTimestamp();
}
return $serialized;
}
