How to get the Image without Background

To get the API -key check the link https://www.remove.bg/api#remove-background

 var userimgUrl = imgUrl;
  var apiKey = "API-KEY";
   var myHeaders = new Headers();
    myHeaders.append("X-Api-Key", apiKey);
    myHeaders.append("Accept", "application/json");
                
    var formdata = new FormData();
    formdata.append("size", "auto");
    formdata.append("image_file_b64", userimgUrl)
    var requestOptions = {
          method: 'POST',
          headers: myHeaders,
          body: formdata,
          redirect: 'follow'
                     };
                                  
fetch("https://api.remove.bg/v1.0/removebg", requestOptions)
  .then((response) => response.json())
  .then(function (response) {
   console.log('response', response)
         })
   .catch(error => console.log('error', error));