Login

To make a new user:

 set system login user blogger class super-user
 set system login user blogger authentication plain-text-password

We get:

    login {
        user blogger {
            uid 2000;
            class super-user;
            authentication {
                encrypted-password "$1$t4LMXMGM$unCU/I8CfgIYvnF4vDa6p1"; ## SECRET-DATA
            }
        }
    }

Model: srx100h
JUNOS Software Release [10.4R6.5]