As part of using this test environment for the Brexit changes we have created a new instance of the app registry. You will be required to create a new application and obtain a fresh set of credentials.
In order to register an application for use in the test environment please click here.
The process is the same as with our live app registry when creating an application, if you require further assistance please follow our guide here.
Ensure you retrieve the following from the app registry:
Now you have your credentials lets look at the changes required when dealing with authentication and making requests.