WEBP GIF's not working

[SantiMNV]

I am trying to upload a .gif image and process it to WEBP format and quality 90%.
But it does not work, it only saves the first frame of the gif.

I have been doing some research, and Pillow must receive the following arguments:
duration and save_all
image.save(im_io, 'webp', duration=image.info["duration"], save_all=True)

But I don't know how can I send this parameters to imagekit model or if it is even possible.

I have tried solving it using a processor, but as it process before the last save, and the last save is the problem... nothing seems to work.

Thanks!