Add JWT Authentication guide

content/guides.json

@@ -1,4 +1,14 @@
 [
+  {
+    "title": "JWT Authentication",
+    "description": "Understand what is JWT authentication and how is it implemented",
+    "url": "/guides/jwt-authentication",
+    "fileName": "jwt-authentication",
+    "featured": true,
+    "author": "kamranahmedse",
+    "updatedAt": "2020-06-20T19:59:14.191Z",
+    "createdAt": "2020-06-20T19:59:14.191Z"
+  },
   {
     "title": "Token Based Authentication",
     "description": "Understand what is token based authentication and how it is implemented",

content/guides/jwt-authentication.md

@@ -0,0 +1,3 @@
+[![](/guides/jwt-authentication.png)](/guides/jwt-authentication.png)
+
+Here is the [original tweet](https://twitter.com/kamranahmedse/status/1273375903511465990) where this image was posted.