Crash: `civo objectstore credential secret` panics with no arguments

[karthik120710]

Description

Running civo objectstore credential secret without --access-key and without a positional argument crashes with an index-out-of-range panic instead of showing a usage error.

File: cmd/objectstore/objectstore_credential_secret.go:33

} else if args[0] != "" {

No Args: validator is set on this command, so args can be empty when this line runs.

Steps to reproduce

civo objectstore credential secret

Expected

A friendly error like "You must provide an access key. See --help for more information." (the command already has this message at line 38, but it's unreachable due to the panic above).

Actual

panic: runtime error: index out of range [0] with length 0