This should work with stqandard Python libraries. You will need to enable SNMP on the Cisco ASA

USAGE

    usage: asausers.py [-h] -f FIREWALL [-i IGNORE] -c COMMUNITY_STRING
                       [-o OUTPUT]

    Get connected users from ASA via SNMP

    optional arguments:
      -h, --help            show this help message and exit
      -f FIREWALL, --firewall FIREWALL
                            Address of the Cisco ASA
      -i IGNORE, --ignore IGNORE
                            Comma separated list of IP addresses to ignore
      -c COMMUNITY_STRING, --community_string COMMUNITY_STRING
                            SNMP community string
      -o OUTPUT, --output OUTPUT
                            Output type, option are json and text. Defaults to json'

OUTPUTS

Default output - json format:

{'users': {'user1': {'Private IP': '10.12.13.14', 'Public IP': '100.100.100.101'}, 'user2': {'Private IP': '10.12.13.15', 'Public IP': '100.100.100.102'}}}

Text output format:

users: user1: Private IP: 10.12.13.14 Public IP: 100.100.100.101 user2: Private IP: 10.12.13.15 Public IP: 100.100.100.102 user3: Private IP: 10.12.13.16 Public IP: 50.50.40.90