[Django]-How to use refresh token to obtain new access token on django-oauth-toolkit?

To get a new access_token, by using your existing refresh_token you need to send a POST request to the same url you used to get the token in the first place (/o/token/, assuming the default url). The grant_type would now be refresh_token, and you also need to authenticate with your client credentials, since you were issued some.

To summarize:
curl -X POST -d "grant_type=refresh_token&client_id=<your_client_id>&client_secret=<your_client_secret>&refresh_token=<your_refresh_token>" http://localhost:8000/o/token/

If you want more information, you can checkout this link to see the relevant section of the standard.

You can pass the post request in POSTMAN. Or Try this, it worked for me:

curl -X POST -H 'Authorization: Basic your_application_id' -d 'refresh_token=your_refresh_token&grant_type=refresh_token' localhost:3000/o/token

{
    "token_type":"bearer",
    "access_token":"eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJ1c2VyIjoiVlx1MDAxNcKbwoNUwoonbFPCu8KhwrYiLCJpYXQiOjE0NDQyNjI4NjYsImV4cCI6MTQ0NDI2Mjg4Nn0.Dww7TC-d0teDAgsmKHw7bhF2THNichsE6rVJq9xu_2s",
    "expires_in":20,
    "refresh_token":"7fd15938c823cf58e78019bea2af142f9449696a"
}

try this Link

To get a new access_token from refresh_token by URL you can use the below URL and pass data in params:

http://127.0.0.1:8000/o/token/?grant_type=refresh_token&refresh_token=<refresh_token_here>&client_id=<your client id here>&client_secret=<your client secret here>

Once you generate a new access_token with the help of refresh_token then the old access_token will be expire.