This application demonstrates the usage of the Analytics Data API using OAuth2 credentials.

Please familiarize yourself with the OAuth2 flow guide at https://developers.google.com/identity/protocols/oauth2

For more information on authenticating as an end user, see https://cloud.google.com/docs/authentication/end-user

In a nutshell, you need to:

1. Create your OAuth2 client credentials in Google Cloud Console. Choose "Web application" when asked for an application type. https://support.google.com/cloud/answer/6158849

2. When configuring the web application credentials, add "http://localhost:3000/" to "Authorized redirect URIs".

3. Download a credentials file using "Download JSON" button in the credentials configuration dialog and save it as oauth2.keys.json in the same directory with this sample app.

4. Replace $property_id variable with the value of the Google Analytics 4 property id you want to access.

5. Install the PHP bcmath extension (due to protocolbuffers/protobuf#4465):

   sudo -s apt-get install php-bcmath
   

6. Run the following commands from the current directory in order to install dependencies and run the sample app:

   composer update
   php -S localhost:3000 -t .
   

7. In a browser, open the following url to start the sample:

http://localhost:3000/