To access any resource in Abowire you will need to create an
Access Token. You can create an Access Token by authenticating using OAuth2 with one of the available grant flows.
In order to authenticate your application, you will need to generate an API Key.
You can create one go to
Settings > API Keys.
There are two kinds of keys you can create (for backend and for frontend integrations). You can read more about that in the Authentication section.
Note: You can't use your sandbox keys to access the production environment and vice versa. You will need a different set of credentials for each environment.