Update README.md

README.md

@@ -7,25 +7,29 @@ A Ruby interface to the [App Store Connect API](https://developer.apple.com/app-
 
 Add this line to your application's Gemfile:
 
-```ruby
+```Ruby
 gem 'app_store_connect'
 ```
 
 And then execute:
 
-    $ bundle
+```Bash
+$ bundle
+```
 
 Or install it yourself as:
 
-    $ gem install app_store_connect
+```Bash
+$ gem install app_store_connect
+```
 
 ## Usage
 
-```ruby 
+```ruby
 AppStoreConnect.config = {
-  issuer_id: issuer_id,
-  key_id: key_id,
-  private_key: private_key
+  issuer_id: 'issuer_id',
+  key_id: 'key_id',
+  private_key: File.read(File.new("/Path/AuthKey.p8"))
 }
 
 app_store_connect = AppStoreConnect::Client.new
@@ -58,6 +62,42 @@ app_store_connect.sales_reports(
 )
 ```
 
+### Fetch All Devices
+
+```ruby
+
+fetchAllDevices = app_store_connect.devices
+puts JSON.pretty_generate(fetchAllDevice)
+
+```
+
+### Register a New Device
+
+```ruby
+result = app_store_connect.create_device(
+    name: 'name',
+    platform: 'IOS',
+    udid: 'udid'
+  )
+
+puts JSON.pretty_generate(result)
+```
+
+
+## Q&A
+
+### How to understand the `devices, sales_reports, create_bundle_id` keyword seen in the demo?
+
+It's function key from `schema.json` file.
+
+### How to understand `()` in the demo, and when should use it? eg: `create_bundle_id()`, `sales_reports()`
+
+`()` is mean: you have mapped to `http_body_type` in file `schema.json`
+
+### How to set this content in `()`
+
+`http_body_type` have a value type. Based on this value, we can find the definition of the relevant configuration in the source code of ruby.
+
 ## Development
 
 After checking out the repo, run `bundle install` to install dependencies. Then, run `rake spec` to run the tests. You can also run `rake console` for an interactive prompt that will allow you to experiment.