Description of problem:

Hammer command for generating registration command does not validate if the activation key exists.

Version-Release number of selected component (if applicable):

satellite-6.18.1-1.el9sat.noarch

How reproducible:

Always

Steps to Reproduce:

Execute the following command on the Satellite with a non-existent activation key. 

hammer host-registration generate-command --activation-key <>

Actual results:

The registration command is generated even when the activation key is not present.

hammer> host-registration generate-command --activation-key CAP-M-1
set -o pipefail && curl --silent --show-error   'https://satellite.example.com/register?activation_keys=CAP-M-1' --header 'Authorization: Bearer' | bash

This will result in 404 error when client is registered using the above command.

Couldn't find activation key 'CAP-M-1' (HTTP error code 404: Not Found)

Expected results:

Ideally, there should be some kind of validation for value provided for the activation key.