Firebase 消息缺少 MongoDB 触发函数中的身份验证密钥：

Question

Please I need help. I don't know what I am doing wrong. I am trying to send push notification from http request but I keep getting this error:

The request was missing an Authentication Key. Please, refer to section "Authentication" of the FCM documentation, at https://firebase.google.com/docs/cloud-messaging/server .

I am currently doing this:

 const response =  await context.http.post({
    url:"https://fcm.googleapis.com/fcm/send",
    header:{"Content-Type": "application/json",
            "Authorization":"key= Web Server Key"},
    body:{
    "to": usersPushToken, // From FirebaseMessaging.instance.getToken();
    "notification": {
      "title": "Title", 
      "body": "body",
      "clickAction": 'FLUTTER_NOTIFICATION_CLICK',
      "sound": 'default',
      },
    }
    },
  encodeBodyAsJSON: true,
  });

My web server key (Cloud Messaging API (Legacy)) I also tried API key:

Answer 1

This was my fault (headers not header) . But I will leave this answer for anyone using Flutter , MongoDB , and Firebase Messaging .

const response =  await context.http.post({
    url:"https://fcm.googleapis.com/fcm/send",
    "headers":{"Content-Type": ["application/json"],  //Must be in array
            "Authorization":["key= Web Server Key"]}, //Must be in array
    "body":{
    "to": usersPushToken, // From FirebaseMessaging.instance.getToken();
    "notification": {
      "title": "Title", 
      "body": "body",
      "clickAction": 'FLUTTER_NOTIFICATION_CLICK',
      "sound": 'default',
      },
     }
    },
  encodeBodyAsJSON: true,
  });