I am facing this error : TypeError: Cannot read property 'token' of undefined
 - Here's [a link](https://github.com/DemigodR/MEAN_Stack/blob/master/server.js)! to my github page

I am using a firefox addon to post data and sending data in json format like: {"x-access-token": "jashiuahf"}

Here is the image [enter image description here](https://i.stack.imgur.com/uMK6Q.png) @fabio

Can anybody help me solve this please!!!