Upload Image using ngx-file-drop in Angular

I am trying to upload image from angular using ngx-file-drop to the server site (https://www.file.io/) and here is what i have from the library documentation:

// Is it a file?
if (droppedFile.fileEntry.isFile) {
  const fileEntry = droppedFile.fileEntry as FileSystemFileEntry;
  fileEntry.file((file: File) => {
 
    this.allfiles.push(droppedFile.relativePath);
 
    const formData = new FormData()
    formData.append('image', file, droppedFile.relativePath)
 
    this.http.post('https://file.io/', formData)
    .subscribe(data => {
      // Sanitized logo returned from backend
    })
 
  });
} else {
  // It was a directory (empty directories are added, otherwise only files)
  const fileEntry = droppedFile.fileEntry as FileSystemDirectoryEntry;
  console.log(droppedFile.relativePath, fileEntry);
}

I am not sure what to do in the following lines of code:

this.http.post('https://file.io/', formData)
.subscribe(data => {
  // Sanitized logo returned from backend
})