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You can register your app with the Logica Sandbox at any time during development. When you register your app, you will get a client_id for your app within the Logica Sandbox. Use this new client_id when launching from the Logica Sandbox. See Register Your App in the Logica Sandbox for detailed instructions.
Step 4: Publish your app in the Logica Gallery
When your application is ready for public viewing, you can publish it to the Logica Gallery. Publishing your app to the Logica Gallery is a great way to market your application and promote it at Healthcare conferences such as HiMMS. See Publish Your App to the Logica Gallery for detailed instructions.