Cancel/abort a multipart upload and clean up any uploaded parts.
Example CURL command:
curl -X DELETE "https://lilt.com/v2/upload/s3/multipart/abc123def456?key=API_KEY&key=uploads/user123/file456.zip"
Basic authentication header of the form Basic <encoded-value>, where <encoded-value> is the base64-encoded string username:password.
Multipart upload ID to cancel
Upload key from initiate response