'OAuth 2.0 - REST API Testing TOSCA

I have tried to authenticate OAuth 2.0 REST API, added Grant Type - Authorization Code Authorization Endpoint - Token Endpoint - Redirect URI - Client ID - Client Secret -

As I am using Microsoft AD connect authentication, it is not showing any browser to enter my User ID and Password. Could any one help me?

Also I am getting error after requesting a token: - "error": "ORA-12514: TNS:listener does not currently know of service requested in connect descriptor"



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