In this block of code the APIKey and Prefix are used to eset a varioable called $headers, but that variable is not used after that as part of the send to Invoke-WebRequest

This means that this part of the documentation fails as it never passes an Authorization header

The fix to this is to update the Authorization header inside the if statement so its passed on to the next call as below

    if ($Configuration.ApiKey -and $Configuration.ApiKeyPrefix) {
        $HeaderParameters["Authorization"] = "$($Configuration.ApiKeyPrefix) $($Configuration.ApiKey.apitoken)"
    }

Will raise a PR shortly including the Mustache fix for this - which will fix part of #90 as well