how can i use the promise method in node?

const email = "[email protected]"
const request = require('request');
function isUserExists(email, kc_accessToken) {
    let url = `${path}/users?email=${email}`;

    return new Promise(function(resolve, reject){
        request({
            url: url,
            headers: {
                "content-type": "application/json",
                "authorization": `Bearer ${kc_accessToken}`
            }
        }, function (error, response, body) {
            if (error) {
                console.log("some error occured");
            }
            if (response.data.length > 0) {
                return resolve();
            }

            return reject();

        });
    });
}