Postman OAuth2 script - client_credentials

postman.oauth2.client.credentials.js

var clientId = pm.variables.get("clientId");
var clientSecret = pm.variables.get("clientSecret");
var scope = pm.variables.get("scope");
var accessTokenURL = pm.variables.get("accessTokenURL");

pm.sendRequest({
    url: accessTokenURL,
    method: "POST",
    header: [
        'Content-Type:application/x-www-form-urlencoded'
    ],
    body: {
        mode: "urlencoded",
        urlencoded: [
            {key: "client_id", value: clientId},
            {key: "client_secret", value: clientSecret},
            {key: "scope", value: scope},
            {key: "grant_type", value: "client_credentials"}
        ]
    },
},
(error, response) => {
    pm.variables.set("rawIdToken", response.json().access_token);
    pm.variables.set("refresh_token", response.json().refresh_token);
});