Credential management
- Account
- config user-security
- add <username> <password> <password> superuser
- show local-user <username>
- config-user <username>
- config-user <username> password <password> <password>
- delete <username>
- SNMP
- configure snmp
- add community <newSnmpCommunity> readonly
- add community <newSnmpCommunity> readwrite
- delete community <oldSnmpCommunity>
- show all-communities
- show community <community string>