postman error

Hi All

              I have been using the post man add on  in chrome to retreive all opportunities records with Closed Won

I have used the

Method:POST

url:

https://<>/rest/v10/oauth2/token?grant_type=password&username=admin&password=xxxx&client_id=data&client_secret=data&platform=base

and when i click on send i get.

{

  "error": "invalid_client",

  "error_message": "The client credentials are invalid"

}

Can any one please update me where i am wrong.

Regards

Sidhu Tevfik Tümer Ramana Raju Santhana Shijin Krishna