if (specified user does not exist) {
    if (rlogin password recieved) {
        create new user with specified password
    }
    else {
        create new user with random password
        show password to user
        allow user to change password
        validate new password
   }
}
else {
    if(password is correct) {
        logon user
    }
    else {
        prompt for current password
    }
}