Creates a signed upload URL. Signed upload URLs can be used to upload files to the bucket without further authentication. They are valid for 2 hours.
buckets
table permissions: noneobjects
table permissions: insert
The file path, including the current file name. For example `'folder/image.png'`.
response = supabase.storage.from_("avatars").create_signed_upload_url(
"folder/avatar1.png"
)