(#100) No matching user found using the facebook messenger bot WORKAROUND

A very common error on the node.js console when typing a message and sending it to the bot is to receive '(#100) No matching user found' as a response.

The workaround for this issue is quite simple: you just need to bypass your own messages.

Use Case

Your Bot has a unique ID (it's not the App ID) so you can try this workaround in your POST logic:

var myID = '...' ;
.....
event = req.body.entry[0].messaging[i];
sender = event.sender.id;
if (event.message && event.message.text && sender != myID) {
.....
}

You can obtain your Bot id by reviewing your messages:

"sender":{
    "id":"USER_ID"
  },

JSON sample:

even.message: 
 {"sender":{"id":"**yourBotID**"},
   "recipient":{"id":"**clientID**"},
   "timestamp":1468241667962,
   "message":   {"**is_echo":true**,        
   "app_id":**appID**,
   "mid":"mid....",
   "seq":617,"text":"..."}}

Tip: to identify your BotID just look for "message": {"is_echo": true,.. in message payload.

Further reading: Message Received Reference - Facebook