public function up()
    {
        $authManager = $this->getAuthManager();
        $this->db = $authManager->db;

        $this->createIndex($this->index, $authManager->assignmentTable, $this->column);
    }
public function up()
    {
        $authManager = $this->getAuthManager();
        $this->db = $authManager->db;

        $this->createIndex($this->index, $authManager->assignmentTable, $this->column);
    }
{@inheritdoc}