./README.md in cupertino-0.2.0 vs ./README.md in cupertino-0.3.0

@@ -11,10 +11,18 @@
 $ gem install cupertino
 ```
 
 ## Usage
 
+### Authentication
+
+```sh
+$ ios login
+```
+
+_Credentials are saved in `.netrc`. You will not be prompted for your username or password by commands  while you are logged in._
+
 ### Devices
 
 ```sh
 $ ios devices:list
 
@@ -71,9 +79,12 @@
 ```
 
 ## Commands
 
 _Crossed out commands are not yet implemented_
+
+- `login`
+- `logout`
 
 - `devices:add`
 - `devices:list`
 - ~~`devices:remove`~~