Is your AdWords API client application still using ClientLogin? If so, you should start your migration from ClientLogin to OAuth 2.0 as soon as possible.
Your AdWords API client applications must be fully migrated to OAuth 2.0 before ClientLogin is sunset in June 2014, as previously announced. If you don't migrate by then, your client applications will fail -- they won't be able to access your MCC account or any AdWords account via the API.
How do I get started?
We have prepared a ClientLogin to OAuth 2.0 migration guide which includes:
- Detailed migration strategies based on use cases
- Code samples to automate parts of the migration
- Client library-specific migration videos, code, and pertinent OAuth 2.0 documentation
You don't want to worry about your applications failing, so get started now. For most developers with a single top level MCC, this migration will involve only a few configuration and code changes. But if you run into any issues with your particular application or AdWords accounts, you'll be glad you left plenty of time before the sunset to work things out.
We are here to help
If you run into any issues, or if you have any questions, please reach out to us on the AdWords API Forum.