Getting images from fire storage - ionic 4

I’m using Ionic v4, so i’m trying to get all the images from firestorage i just didn’t find a way how to get them all.
I’m trying to get them from a folder called ‘images’ and display them.

getImage(){
    firebase.storage().ref().child("/images/").getDownloadURL()
        .then((response:string) =>
            console.log(response))
        .catch(error =>
            console.log('error', error))
  }

As you can see there’s no reference to get its URL, i need some help here, thanks.