post https://api-sandbox.orum.io/oauth/token
Contact Orum for access to an Orum Portal account, where you can set up your login credentials.
Use this /oauth/token endpoint to exchange API credentials created in the Portal (client_id and client_secret) for an access_token.
To authenticate to all protected Orum endpoints, pass the access_token in the Authorization header Bearer ${token}.
The auth token is valid for one hour.