Credential management
- Account
- username <user> privilege 0 password <password> +username <user> enable
- no username <user>
- username <user> password <password>
- SNMP
- snmp-server community <newCommunity> ro
- snmp-server community <newCommunity> rw
- no snmp-server community <oldCommunity> ro
- no snmp-server community <oldCommunity> rw