The descriptor text, or a plugin URL in another CUBE.
Compute resources to register the plugin on.
OptionaladminToken: string
An administrator token to upload as; the session's client when absent.
The registered plugin's fields, or an error on the error stack.
Registers one plugin through CUBE's administrative upload, as the session or as an administrator token.
The descriptor form and the store-URL form share this path, and a refusal carries CUBE's own reason (an existing version, an image already used, a descriptor the upload rejects) rather than chrisapi's generic one.