message: bug: Fix setting contentType even tho there's no body
diff: @@ -90,7 +90,7 @@ export class APIRequest {
  )
  form.append('payload_json', JSON.stringify(body))
  body = form
  - } else {
  + } else if (body !== undefined) {
  contentType = 'application/json'
  body = JSON.stringify(body)
  }
  