Hi, get this message following the steps provided here : https://developer.salesforce.com/page/Getting_Started_with_the_Force.com_REST_API

So after getting the autorization code I trying to the access token and I have this message:

Error: call to token URL https://login.salesforce.com/services/oauth2/token failed with status 400, response {"error":"invalid_grant","error_description":"authentication failure"}, curl_error , curl_errno 0


I Have https url with a certificate.

I'm not able to find a support team or more info aobut the error