How select an image already upload in keystone ?

[ninipo0002]

Hi, 

I would like know how change the picture upload in post thanks to a list from cloudinary ?

I try this : image: { type: Types.CloudinaryImage,  folder: 'path/to/image' ,select : true, selectPrefix: 'path/to/images' } but does not work.

I have not a list of picture already uploaded, i can just select a new image from my computer!

Have you an idea ? Thank you !!!!