Undefined error while getting respnose return from API

Question

I was trying to get the client IP address using ipify API. I have used fetch and await & I am getting the right response by calling the prototype. But while I am trying to return the value from the function and trying to store it on a const variable, it's showing undefined. I need the IP address value to pass on weather API. code:-

class CurrentLocaion{
     //Fetch current IP from api ipfy
    async getCurrentIpAddress(){
        const response = await fetch('http://api.ipify.org/?format=json');

        const responseData = await response.json();
        return responseData;
    } 
}
//init currentlocation object
const currentLocation = new CurrentLocaion();

function getIpAddress(){
    currentLocation.getCurrentIpAddress()
    .then(results =>{
        return results.ip;
    })
}

const ipvalue = getIpAddress();
console.log(ipvalue);

I think I might have done some silly mistake, But unable to discover. Any help will be a big thank you.