Authorize your API calls

All of Pirelli's APIs use one of the following forms of authorization: + [**OAuth2.0**](/docs/authorize_your_api_calls/OAuth20) + [**X-Api-Key**](/docs/authorize_your_api_calls/X-Api-Key) Exceptionally the authorization for some APIs can be managed directly by the backend. If this is the case you will find instructions on how to proceed in the documentation dedicated to that API.