I'm trying to implement the Bitbucket oauth in Node JS. But I need to know how can we use refresh token?

Also I refer your Bitbucket API documentation for refresh token BitBucket api documentation for Refresh token. It's quite confusing.Below the API Call for Refresh token.

$ curl -X POST -u "client_id:secret"
https://bitbucket.org/site/oauth2/access_token
-d grant_type=refresh_token -d refresh_token=

. I don't know how can I pass the value in that without getting refresh _token value. Where can I get the refresh token? How can I use the refresh token? Because the access token will be expire in 1 hour. So that I have to use refresh token. Can anybody help me out?

Also I tried run that API. I put access token as refresh_token value. But I got the response in body like below.

body: '

' }

#!node js