Merge pull request Cooya#22 from samjco/patch-1

Added link to video of how to find the "li_at" session cookie

Author: Nicolas

README.md

@@ -14,7 +14,8 @@ npm i linkedin-client
 
 ## Usage
 
-You need your Linkedin cookie called "**li_at**". This way, requests will be sent on your behalf.
+You need your Linkedin cookie called "**li_at**". This way, requests will be sent on your behalf. 
+You can follow [these instructions](https://skwid-prod.s3.eu-west-3.amazonaws.com/resources/linkedin-authentication.mp4) to retrieve your Linkedin session cookie.
 
 ```js
 const LinkedinClient = require('linkedin-client');