List inventory items for a given user.
```
Usage: rbxcloud inventory list [OPTIONS] --user-id <USER_ID> --api-key <API_KEY>
Options:
-u, --user-id <USER_ID> Roblox user ID
-p, --pretty Pretty-print the JSON response
-m, --max-page-size <MAX_PAGE_SIZE> Max page size
-n, --page-token <PAGE_TOKEN> Next page token
-f, --filter <FILTER> Filter string
-a, --api-key <API_KEY> Roblox Open Cloud API Key [env: RBXCLOUD_API_KEY=]
-h, --help Print help
```