Zend Framework 2 + Doctrine 2 and Authentication Service - orm

Question

It was successfully working before I changed the authentication service name from 'orm_default' to 'admin', and it is necessary since I have more modules which uses more authentication services.
The problem is I'm getting the following error:
Fatal error: Uncaught exception 'Zend\ServiceManager\Exception\ServiceNotFoundException' with message 'Zend\ServiceManager\ServiceManager::get was unable to fetch or create an instance for doctrine.authenticationservice.admin'
My module.config.php
'doctrine' => array
(
'driver' => array
(
__NAMESPACE__ . '_driver' => array
(
'class' => 'Doctrine\ORM\Mapping\Driver\AnnotationDriver',
'cache' => 'array',
'paths' => array(__DIR__ . '/../src/' . __NAMESPACE__ . '/Entity')
),
'orm_default' => array
(
'drivers' => array
(
__NAMESPACE__ . '\Entity' => __NAMESPACE__ . '_driver'
),
)
),
'authentication' => array
(
'admin' => array
(
'object_manager' => 'Doctrine\ORM\EntityManager',
'identity_class' => __NAMESPACE__ . '\Entity\User',
'identity_property' => 'email',
'credential_property' => 'password',
'credentialCallable' => __NAMESPACE__ . '\Model\User::hashPassword'
),
),
),
My Module.php
public function getServiceConfig()
{
return array
(
'factories' => array
(
'Admin\Auth' => function($sm)
{
return $sm->get('doctrine.authenticationservice.admin');
},
'Admin\Form\Auth\Login' => function($sm)
{
return new Form\Auth\Login();
},
),
);
}

Answer 1

It was confirmed as a bug: https://github.com/doctrine/DoctrineORMModule/issues/291
According to a comment in a doctrine module source file it plans to be fixed in 1.0. In this meantime you can it in your any module.config.php file of your application like this:
'authentication' =>
[
'application' =>
[
'object_manager' => 'Doctrine\ORM\EntityManager',
'identity_class' => 'Application\Entity\Customer',
'identity_property' => 'email',
'credential_property' => 'password',
'credentialCallable' => 'Application\Entity\Customer::hashPassword'
],
],
'authenticationadapter' =>
[
'application' => true,
],
'authenticationstorage' =>
[
'application' => true,
],
'authenticationservice' =>
[
'application' => true,
]

Answer 2

I had exactly same problem when i was working on my project. After working my *ss out for two nights, i solved the problem by simply re-installing the doctrine-orm-module after reading https://github.com/doctrine/DoctrineORMModule, "Registered Service names" section. This simply means doctrine orm module wasn't properly installed, or wasn't installed.