What is the nature and description of the request?

This credential type should have a field for certificate auth since it seems that the underlying inventory plugin that can be used with it appears to support it: https://console.redhat.com/ansible/automation-hub/repo/published/azure/azcollection/content/inventory/azure_rm#parameters

x509_certificate_path
path
Path to the X509 certificate used to create the service principal in PEM format.

The certificate must be appended to the private key.

Use when authenticating with a Service Principal. 

Why does the customer need this? (List the business requirements here)

To be able to keep the certificate used for authentication private and to be able to retrieve it from Cyberark during run time.

How would you like to achieve this? (List the functional requirements here)

Add a new field to the credential_type, optional, that will accept the certificate and properly translate it to the inventory plugin.