To be able to use Aptito Public API you need to make several steps:
Step 1. Signup for Public API account
Step 2. Register your application
Once you've done the account registration you will see the "Applications" page. Here you can add your applications to create a new access token.
Fill in the name and url fields and click "Add application" button.
After this you will see the Client ID and Client Secret values generated for your application. Now you can use them to authorize access to public API methods from your application.