列出所有richmenu
methods：GET
url：https://api.line.me/v2/bot/richmenu/list
Authorization：Bearer Token
查看richmenu
methods：GET
url：https://api.line.me/v2/bot/richmenu/{rich menu id}
Authorization：Bearer Token
查看預設richmenu
methods：GET
url：https://api.line.me/v2/bot/user/all/richmenu
Authorization：Bearer Token
下載richmenu的圖片
methods：GET
url：https://api.line.me/v2/bot/richmenu/{rich menu id}/content
Authorization：Bearer Token
刪除richmenu
methods：DELETE
url：https://api.line.me/v2/bot/richmenu/{rich menu id}
Authorization：Bearer Token
