Adds an authorized user to a disk. Users can authenticate via:
API key (format key-{API_KEY})
Disk ID (format dsk-{16 hex chars})
^dsk-[0-9a-f]{16}$"dsk-0123456789abcdef"
token 255Deprecated. Client-provided token. If omitted, the server generates a cryptographically secure token and returns it in the response.
2048Deprecated. Last 4 characters of the token. Required when principal is provided; ignored when the server generates the token.
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