Updated the reference doc

Author: rohitmishra209

examples/node/index.js

@@ -3,7 +3,7 @@
 const ContentstackDemo = require('./contentstack-demo.js')
 
 //const Demo = new ContentstackDemo({ 'api_key': "blt292960b854e5170e", 'access_token': "blt468d2af41a0f061c", 'environment': "development"})
-const Demo = new ContentstackDemo({ 'api_key': "blt477ba55f9a67bcdf", 'access_token': "cs7731f03a2feef7713546fde5", 'environment': "web"})
+const Demo = new ContentstackDemo({ 'api_key': "", 'access_token': "", 'environment': ""})
 
 
     //get all the entries

src/core/stack.js

@@ -252,7 +252,7 @@ export default class Stack {
      /**
      * @method fetch
      * @memberOf Stack
-     * @description This method will returns information of a specific content type. It returns the content type schema.
+     * @description This method returns the complete information of a specific content type.
      * @example
      * let single_contenttype = Stack.ContentType(content_type_uid).fetch()
      *    single_contenttype
@@ -341,7 +341,7 @@ export default class Stack {
      /**
      * @method getContentTypes
      * @memberOf Stack
-     * @description getContentTypes method returns comprehensive information of all the content types available in a particular stack in your account.
+     * @description This method returns comprehensive information of all the content types of a particular stack in your account.
      * @example Stack.getContentTypes()
      * @example 
      * let data = Stack.getContentTypes()