Update nest docs

source/_components/nest.markdown

@@ -12,27 +12,13 @@ ha_category: Hub
 featured: true
 ---
 
-The Nest component is the main component to integrate all [Nest](https://nest.com/) related platforms. Besides this component you will have to setup your thermostat and any connected sensors separately.
+The Nest component is the main component to integrate all [Nest](https://nest.com/) related platforms. To connect Nest, you will have to [sign up for a developer account](https://developers.nest.com/products) and get a client_id and client_secret.
 
 ```yaml
 # Example configuration.yaml entry
 nest:
-  username: USERNAME
-  password: PASSWORD
-
-climate:
-  platform: nest
-```
-
-```yaml
-# Example configuration.yaml entry to show only devices at your vacation home
-nest:
-  username: USERNAME
-  password: PASSWORD
-  structure: Vacation
-
-climate:
-  platform: nest
+  client_id: ABCD
+  client_secret: ABCD
 ```
 
 ```yaml
@@ -43,13 +29,10 @@ nest:
   structure:
     - Vacation
     - Primary
-
-climate:
-  platform: nest
 ```
 
 Configuration variables:
 
-- **username** (*Required*): Your Nest username.
-- **password** (*Required*): Your Nest password.
+- **client_id** (*Required*): Your Nest developer client id.
+- **client_secret** (*Required*): Your Nest developer client secret.
 - **structure** (*Optional*): The structure or structures you would like to include devices from. If not specified, this will include all structures in your Nest account.