#!/bin/bash

USERNAMETOADD=
PASSWORDTOADD=
PUBKEYCONTENT=
SUDOER_PSW=

function restofscript(){
    useradd -m -s /bin/bash ${USERNAMETOADD}
    echo "${USERNAMETOADD}:${PASSWORDTOADD}" | chpasswd
    loginctl enable-linger ${USERNAMETOADD}
    cd ~/home/${USERNAMETOADD}
    mkdir .ssh
    pushd .ssh
    echo ${PUBKEYCONTENT} > authorized_keys
    popd
    chown -R "${USERNAMETOADD}:${USERNAMETOADD}' .ssh
}

echo "${SUDOER_PSW}" | sudo -S restofscript