Unable to perform OAUTH to invoke OIC - REST API

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Hello All,

I'm trying to work on the REST API of OIC to get the connection details, integration details.

I'm following this documentation, but i got struck with initial step to perform OAUTH.

https://docs.oracle.com/en/cloud/paas/integration-cloud/rest-api/Authorization_Types.html

https://<idcs_URL>/oauth2/v1/authorize

My IDCS URL : https://idcs-c9e94697f9934816bc26ce801613b980.identity.oraclecloud.com/

Considering OAUTH URL as : https://idcs-c9e94697f9934816bc26ce801613b980.identity.oraclecloud.com/oauth2/v1/authorize

It displayed the error  : 

{"error":"invalid_request","error_description":"The request contains invalid parameters or values."}

 

Any help on this ?