update google auth config docs

docs/sources/installation/configuration.md

@@ -419,25 +419,33 @@ allowed_organizations = github google
 
 ## [auth.google]
 
-You need to create a Google project. You can do this in the [Google
-Developer Console](https://console.developers.google.com/project).  When
-you create the project you will need to specify a callback URL. Specify
-this as callback:
+First, you need to create a Google OAuth Client:
 
-```bash
-http://<my_grafana_server_name_or_ip>:<grafana_server_port>/login/google
-```
+1. Go to https://console.developers.google.com/apis/credentials
 
-This callback URL must match the full HTTP address that you use in your
-browser to access Grafana, but with the prefix path of `/login/google`.
-When the Google project is created you will get a Client ID and a Client
-Secret. Specify these in the Grafana configuration file. For example:
+2. Click the 'Create Credentials' button, then click 'OAuth Client ID' in the
+menu that drops down
+
+3. Enter the following:
+
+   - Application Type: Web Application
+   - Name: Grafana
+   - Authorized Javascript Origins: https://grafana.mycompany.com
+   - Authorized Redirect URLs: https://grafana.mycompany.com/login/google
+
+   Replace https://grafana.mycompany.com with the URL of your Grafana instance.
+
+4. Click Create
+
+5. Copy the Client ID and Client Secret from the 'OAuth Client' modal
+
+Specify the Client ID and Secret in the Grafana configuration file. For example:
 
 ```bash
 [auth.google]
 enabled = true
-client_id = YOUR_GOOGLE_APP_CLIENT_ID
-client_secret = YOUR_GOOGLE_APP_CLIENT_SECRET
+client_id = CLIENT_ID
+client_secret = CLIENT_SECRET
 scopes = https://www.googleapis.com/auth/userinfo.profile https://www.googleapis.com/auth/userinfo.email
 auth_url = https://accounts.google.com/o/oauth2/auth
 token_url = https://accounts.google.com/o/oauth2/token