REST API to retrieve shared network SNMP credentials

NetBrain currently does not provide a RESTful API method to retrieve the full list of configured shared network SNMP credentials, including SNMP read and privilege credentials that are not actively assigned to any device. Users can only query which shared credentials are in use by specific devices, leaving no way to programmatically audit the complete credential set. This enhancement would add an API endpoint to list all shared network SNMP credentials configured in a domain, regardless of device assignment. Customers automating credential audits and compliance checks would benefit from complete visibility into configured credentials without relying on manual review through the user interface.