Yii::configure does not work in module init() - php

Question

I have a module calls API, and i want to load config file for it. The guide says that i have to use function \Yii::configure. I use it, but it doesn't apply any new configs. And i tried to use array instead config file, the result is same
class API extends \yii\base\Module
{
public $controllerNamespace = 'api\client\controllers';
public function init()
{
parent::init();
// \Yii::configure($this, require(__DIR__ . '/config/main.php'));
\yii::configure($this, [
'components' => [
'user' => [
'class' => 'yii\web\UserTest',
'identityClass' => 'api\client\models\User',
],
]
]);
echo \yii::$app->user->className();
die();
}
}
How I can override config in my module ?

Answer 1

UPDATE
You have to use setComponents method of Yii::$app
Yii::$app->setComponents(
[
'errorHandler'=>[
'errorAction'=>'forum/forum/error',
'class'=>'yii\web\ErrorHandler',
],
'user' => [
'class' => 'yii\web\User',
'identityClass' => 'app\modules\profile\models\User',
],
]
);
OLD ANSWER
Didn't it give you errors? Your casing are wrong and so instead of "yii" in small letters use "Yii" capitalized
class API extends \yii\base\Module
{
public $controllerNamespace = 'api\client\controllers';
public function init()
{
parent::init();
\Yii::configure($this, [
'components' => [
'user' => [
'class' => 'yii\web\UserTest',
'identityClass' => 'api\client\models\User',
],
]
]);
echo \Yii::$app->user->className();
die();
}
}

Answer 2

I see no reason to override the application components here. I'd use #StefanoMtangoo trick but to set the component to the Module itself instead of Yii::$app:
public function init()
{
parent::init();
$this->setComponents([
'db' => [
'class' => 'yii2tech\filedb\Connection',
'path' => '#app/builder/data',
]
]);
}
Then the tricky part is to differentiate between any app's components and your module's own components. For example if my Module had a model extending yii\db\ActiveRecord I'd override its getDB() as follow (original code here):
public static function getDb()
{
return Yii::$app->getModule('api')->get('db');
// instead of: return Yii::$app->getDb();
}
So whatever the app that is using my module has or hasn't a db component it won't matter.