I am trying to test the Webserver OAuth as described here
I can get the authorization code successfully by opening https://login.salesforce.com/services/oauth2/authorize?response_type=code&client_id=(xxxxxx) &redirect_uri=https://www.getpostman.com/oauth2/callback. This results in the Code after the authorization is complete
Now comes the problem, for some reason when i try to use the 'code' for the POST request to the https://login.salesforce.com/services/oauth2/token, i am getting {"error":"invalid_grant","error_description":"authentication failure"}
even though all parameters are correct. I have also relaxed all IP restrictions.
I was reading this, but again my endpoint is correct since this is a DE org and all parameters look ok, am i missing anything. Attaching screenshot for reference,