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Helpers
Identity
The Identity helper allows retrieving the identity from the
AuthenticationService.
For the Identity helper to work, a Laminas\Authentication\AuthenticationService
or Laminas\Authentication\AuthenticationServiceInterface name or alias must be
defined and recognized by the ServiceManager.
Identity returns the identity discovered in the AuthenticationService, or
null if no identity is available.
Basic Usage
<?php
    if ($user = $this->identity()) {
        echo 'Logged in as ' . $this->escapeHtml($user->getUsername());
    } else {
        echo 'Not logged in';
    }
?>Using with ServiceManager
When invoked, the Identity plugin will look for a service by the name or alias
Laminas\Authentication\AuthenticationService in the ServiceManager. You can
provide this service to the ServiceManager in a configuration file:
// In a configuration file...
use Laminas\Authentication\AuthenticationService;
use Laminas\ServiceManager\Factory\InvokableFactory;
return [
    'service_manager' => [
        'aliases' => [
            'my_auth_service' => AuthenticationService::class,
        ],
        'factories' => [
            AuthenticationService::class => InvokableFactory::class,
        ],
    ],
];If that service is not registered, the plugin will then look for a service named
Laminas\Authentication\AuthenticationServiceInterface, and use that if found.