Yii2 Advanced app, different session for frontend and backend with subdomains

Question

I have a problem with my Yii2 app. I have a advanced-app with frontend and backend parts on different domains (subdomain). I use webvimark user management module, but I think the problem is not in it.

Frontend app -> domain.com
Backend app -> admin.domain.com

So I have problem with login in backend, it is not working.
I enter login and password, and after submit form I see login form again.

'user' => [
        'identityClass' => 'webvimark\modules\UserManagement\models\User',
        'enableAutoLogin' => true,
        'identityCookie' => [
            'name'     => '_backendIdentity',
            'domain'     => 'admin.domain.com',
        ],
        'class' => 'webvimark\modules\UserManagement\components\UserConfig',
    ],

and

'session' => [
        'name' => 'BACKENDSESSID',
        'cookieParams' => [
            'domain'     => 'admin.domain.com',
        ],
    ],

Any ideas?

Update #1: My config located: /backend/config/main.php
Update #2: There was a problem when transferring backend on a subdomain

Answer 1

Okey, there was a problem with the configuration of the module, as well as the wrong config in the frontend.

Backend:

'user' => [
        'identityClass' => 'webvimark\modules\UserManagement\models\User',
        'enableAutoLogin' => true,
        'identityCookie' => [
            'name' => '_backendIdentity',
            'domain' => 'backend.test.dev',
        ],
        'class' => 'webvimark\modules\UserManagement\components\UserConfig',
        'on afterLogin' => function ($event) {
            \webvimark\modules\UserManagement\models\UserVisitLog::newVisitor($event->identity->id);
        },
    ],
    'session' => [
        'name' => 'BACKENDSESSID',
        'cookieParams' => [
            'domain' => 'backend.test.dev',
        ],
    ],

Frontend:

'user' => [
        'identityClass' => 'webvimark\modules\UserManagement\models\User',
        'enableAutoLogin' => true,
        'identityCookie' => [
            'name'     => '_frontendIdentity',
            'path'     => '/',
        ],
        'class' => 'webvimark\modules\UserManagement\components\UserConfig',
        'on afterLogin' => function ($event) {
            \webvimark\modules\UserManagement\models\UserVisitLog::newVisitor($event->identity->id);
        }
    ],
    'session' => [
        'name' => 'FRONTENDSESSID',
        'cookieParams' => [
            'path'     => '/',
        ],
    ],