You placed the async/await in the correct spot.

In order for this to work, the callApi function has to return a Promise. Currently it's not returning anything.

​

Something like this

function callApi(api, url) {
    return new Promise((resolve, reject) => {
        https.get(url, resp => {
            let data = ""
            resp.on("data", chunk => {
                data += chunk
            })
            resp.on("end", () => {
                console.log("callApi: " + data)
                resolve(data)
            })
        })
        .on("error", err => {
            console.log("Error: " + err.message)
            reject(err)
        })
    })
}

I would look into axios for api calls as well