cdef class CDNCredentials:
    cdef str host
    cdef str downloader_access_key
    cdef str downloader_access_secret
    cdef str uploader_access_key
    cdef str uploader_access_secret

cdef class CDNManager:
    cdef CDNCredentials creds
    cdef object download_client
    cdef object upload_client

    cdef upload(self, str bucket, str filename, bytes file_bytes)
    cdef download(self, str bucket, str filename)