public function upload($file, $format = 'json', $album = null, $name = null, $title = null, $description = null)
	{
		return $this->post('https://api.imgur.com/3/image.' . $format, array(
			'image' => $file,
			'album' => $album,
			'name' => $name,
			'title' => $title,
			'description' => $description
		), array(
			'Authorization: Client-ID ' . $this->key
		));
	}