post https://login.public.post-prod.lifen.fr/oauth/token#client_credentials
This is the OAuth 2.0 grant that server processes use to access an API. Use this endpoint to directly request an Access Token by using the Client's credentials (a Client ID and a Client Secret).
The Access Token should be kept between API calls to improve performances until it expires. A token renew strategy can be implemented when Lifen APIs replies to calls with a 401 HTTP status, meaning the Access Token has expired.