Changes to Check a UAC Connection Registration Status

the response property data/ip_address became nullable for the status 200

the response property data/last_registration became nullable for the status 200

the response property data/port became nullable for the status 200

the response property data/sip_username became nullable for the status 200

the response property data/transport became nullable for the status 200

the response property data/user_agent became nullable for the status 200

endpoint added