Error: SQLSTATE[42703]: Undefined column: 7 ERROR: Column users.username doesn't exist LINE 1: SELECT Users.id AS "Users__id", Users.username AS "Users__us... ^

public function change()
{
    $table = $this->table('users', ['id' => false, 'primary_key' => ['id']]);
    $table->addColumn('id', 'uuid');
    $table->addColumn('email', 'string', [
        'default' => null,
        'limit' => 254,
        'null' => false,
    ]);
    $table->addColumn('password', 'binary', [
        'default' => null,
        'null' => false,
    ]);
    $table->addColumn('created', 'datetime', [
        'default' => null,
        'null' => false,
    ]);
    $table->addColumn('modified', 'datetime', [
        'default' => null,
        'null' => false,
    ]);
    $table->create();
}

public function beforeFilter(Event $event)
{
    parent::beforeFilter($event);

    $this->loadComponent('Auth', [
        'authenticate' => [
            'Digest' => [
                'fields' => ['username' => 'email'],
                'userModel' => 'Users',
                'finder' => 'auth'
            ],
        ],
        'loginAction' => [
            'controller' => 'Users',
            'action' => 'login'
        ],
        'authError' => 'Dazu hast du keine Rechte...',
        'storage' => 'Memory',
        'unauthorizedRedirect' => false
    ]);
}

public function beforeFilter(Event $event)
{
    parent::beforeFilter($event);
    // Load the Type using the 'Elastic' provider.
    $this->loadModel('Users', 'Elastic');

    $this->Auth->allow(['index', 'view']);
    if (!$this->Auth->user()){
        $this->Auth->allow('add');
    }
}

public function edit($id = null)
{
    $user = $this->Users->get($id, [
        'contain' => []
    ]);
    if ($this->request->is(['patch', 'post', 'put'])) {
        $user = $this->Users->patchEntity($user, $this->request->data);
        if ($this->Users->save($user)) {
            $this->Flash->success(__('The user has been saved.'));
            return $this->redirect(['action' => 'index']);
        } else {
            $this->Flash->error(__('The user could not be saved. Please, try again.'));
        }
    }
    $this->set(compact('user'));
    $this->set('_serialize', ['user']);
}

class User extends Entity
{
    protected function _setPassword($password)
    {
        if (strlen($password) > 0) {
            return (new DefaultPasswordHasher)->hash($password);
        }
    }
}

public function initialize(array $config)
{
    $this->addBehavior('Timestamp', [
        'events' => [
            'Model.beforeSave' => [
                'created_at' => 'new',
                'modified_at' => 'always'
            ]
        ]
    ]);
}

public function beforeSave(Event $event)
{
    $entity = $event->data['entity'];

    // Make a password for digest auth.
    $entity->password = DigestAuthenticate::password(
        $entity->email, //maybe change to username
        $entity->plain_password,
        env('SERVER_NAME')
    );

    $entity->created = Time::now();
    return true;
}

public function findAuth(CakeORMQuery $query, array $options)
{
    $query
        ->select(['id', 'username', 'password'])
        ->where(['Users.active' => 1]);

    return $query;
}

<nav class="large-3 medium-4 columns" id="actions-sidebar">
<ul class="side-nav">
    <li class="heading"><?= __('Actions') ?></li>
    <li><?= $this->Form->postLink(
            __('Delete'),
            ['action' => 'delete', $user->id],
            ['confirm' => __('Are you sure you want to delete # {0}?', $user->id)]
        )
    ?></li>
    <li><?= $this->Html->link(__('List Users'), ['action' => 'index']) ?>     </li>
</ul>
</nav>
<div class="users form large-9 medium-8 columns content">
<?= $this->Form->create($user) ?>
<fieldset>
    <legend><?= __('Edit User') ?></legend>
    <?php
        echo $this->Form->input('email');
    ?>
</fieldset>
<?= $this->Form->button(__('Submit')) ?>
<?= $this->Form->end() ?>
</div>