public function removeExpiredRegistrations($conditions = []) {
		$defaults = [
			$this->_table->aliasField($this->_field('emailVerified')) => 0,
			$this->_table->aliasField($this->_field('emailTokenExpires')) . ' <' => date('Y-m-d H:i:s')
		];

		$conditions = Hash::merge($defaults, $conditions);
		$count = $this->_table
			->find()
			->where($conditions)
			->count();

		if ($count > 0) {
			$this->_table->deleteAll($conditions);
		}

		return $count;
	}