In order for you to be able to interact with the Apexgo API, you will need an API Key, which will be passed in the Bearer field of each request.
To get your key, go to https://apexgo.io and register on the site. Once logged into your account, go to the menu and select Developer Hub. A box will appear where you can generate a new key. This key will be used in requests to the Apexgo API. Treat it safely, don't share it with others.