public function set_columns() {

		return array(
			'description'   => __( 'Description', 'lifterlms' ),
			'truncated_key' => __( 'Consumer key', 'lifterlms' ),
			'user_id'       => __( 'User', 'lifterlms' ),
			'permissions'   => __( 'Permissions', 'lifterlms' ),
			'last_access'   => __( 'Last Access', 'lifterlms' ),
		);

	}