Google Drive API doesn’t show files inline

I am trying to show a file from the Google Drive API inline so that the browser will display it. So far when I request the file it only downloads it. But when I add some code to make it show it in line I get the error “Failed to load PDF document”.

Here is my code:

const googleFile = new Request(`https://www.googleapis.com/drive/v3/files/${FileID}?alt=media`, {
      method: "GET",
      headers: {
        "Authorization": `Bearer ${googletoken}`,
      },
    });
const googleFileResponse = new Response(fetch(googleFile), {
      headers: {
        'Content-Disposition': 'inline',
      }
    });
    return googleFileResponse

Thanks for your help.