README.md in redd-0.7.0 vs README.md in redd-0.7.1

@@ -9,14 +9,13 @@
 
 ---
 
 #### Gemfile
 ```ruby
-gem "ruby", "~> 0.7.0"
-# if you're feeling adventurous
-# gem "redd", github: "avidw/redd", branch: "oauth2"
+gem "redd", "~> 0.7.0"
 
+# Optional fast JSON parser.
 gem "oj", platforms: :ruby
 ```
 
 #### Getting Started
 ```ruby
@@ -34,20 +33,36 @@
 # See documentation for more grants.
 ```
 
 ```ruby
 # Access
+require "secure_random"
+require "sinatra"
+
+enable :sessions
+
+get "/auth" do
+  state = SecureRandom.urlsafe_base64
+  session[:state] = state
+  redirect w.auth_url(state, %w(identity), :permanent)
+end
+
 get "/redirect" do
+  halt 500, "Your state doesn't match!" unless session[:state] == params[:state]
   access = w.authorize!(params[:code])
   session[:access] = access.to_json
   redirect to("/name")
 end
 
 get "/name" do
-  session_access = Access.from_json(session[:access])
-  w.with(session_access) do |client|
-    client.refresh_access! if session_access.expired?
-    "Your username is #{client.me.name}"
+  if session[:access]
+    session_access = Redd::Access.from_json(session[:access])
+    w.with(session_access) do |client|
+      client.refresh_access! if session_access.expired?
+      "Your username is #{client.me.name}"
+    end
+  else
+    redirect to("/auth")
   end
 end
 
 ```