从Fire Base（FCM）批量发送推送通知吗？

Question

任何人都可以告诉我如何使用FCM向一组组ID发送推送通知。

我尝试了

url =“ https://fcm.googleapis.com/fcm/send”

headers = {
    "Content-Type":"application/json",
    "Authorization":"key={}".format(API_KEY)
    }

body = {
    "registration_ids":["group_id1","group_id2",...."group_idn"],
    "data": {
        "hello": "This is a Firebase Cloud Messaging Device Group Message!",
        }
    }

但这给了我错误。

  

{“ multicast_id”：6704816187425274139，“成功”：0，“失败”：1，“ canonical_ids”：0，“结果”：[{“错误”：“未注册”}]}}