How to show a list of belongs in relational data

I have two model like this:

User:

id - username

Image:

id - img - user_id

each user has many images. so it sounds I should use hasMany relation .

I know how can I use if I have a list of users. now how can I show a list of images by usernames :

list of images :

img - username

in User model :

  public function image()
    {
        return $this->hasMany('Image');
    }

in Image model:

public function user()
{
    return $this->belongsTo('User');
}

via Chebli Mohamed