Once you have the configuration requirements, you're ready to set up a client library to handle Google Ads API calls. Since each client library is configured differently, follow the instructions linked to below for your particular programming language.
Configure client library with OAuth2 credentials
Verify your configuration
When you've completed setting up OAuth, make a call to the Google Ads API using one of
the provided code examples in the client library. Choose a simple example like
GetCampaigns) to verify your setup.
If you're building a large or complicated app, proceed to Optimizing Oauth Requests.