In Developer Center, you create an app to generate an API key and secret for an API product(s). Once you create an app, you can edit it (e.g., to update the name or adjust the products the app covers), or delete it if you no longer need it.
Select the environment you want to add an app for. (By default, Developer Center selects Production.)
In the Product section, click the checkbox next to the API(s) you want to use with your app.
Click Add App.
Developer Center creates the app, emails you using the address in your profile, sends a request to the API team, and sets the status to Pending Approval. Once the API team approves your app, Developer Center changes the status to Approved. (If your app is denied, Developer Center shows a status of Declined.)