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Oracle IDCS - How to authenticate a REST API call to /token endpoint

User_Y59QJJan 24 2022 — edited Jan 24 2022

I need to retrieve an access token using the Client Credentials flow in Oracle IDCS. When I call the /token endpoint I'm getting an unauthorized error.
<H1>Unauthorized</H1>
Proper authorization is required for this area. Either your browser does not perform authorization, or your
authorization has failed.
How do I authenticate the /token API correctly?
What I've tried so far using Postman:
POST ``https://idcs-*.identity.oraclecloud.com/oauth2/v2/token``

Body -
grant_type = client_credentials
client_id = *
client_secret = *

Header - Authorization: Basic <base64encoded client_Id:client_secret>

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Added on Jan 24 2022
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