How can I add a new value to Yii::$app->user?

Question

Yii

Yii2 has a Yii::$app->user class.
Now I can call Yii::$app->user->getId() from anywhere in the application and get the user id.
Can you please tell me how to add more like this:
Yii::$app->user->getRole() - Role
Yii::$app->user->getUsername() - Name
...
???

Answer 1

user is a component.
What you are most likely looking for is \Yii::$app->user->identity.
For example, \Yii::$app->user->identity->role.