migrate all users from one linux server to another

moveusers.sh

#!/usr/bin/env bash

targetsrv=user@ip.add.re.ss

for user in $(ssh $targetsrv ls /home)
do
    if ! id $user > /dev/null 2>&1
    then
        echo "create user $user"
        useradd -m -s /bin/bash $user
        pass=$(ssh $targetsrv grep $user: /etc/shadow | awk -F: '{print $2}')
        if [ "$pass" == "!" ]
        then
            echo "locking password for $user"
            passwd -l $user
        else
            echo "setting password for $user"
            usermod -p "$pass" $user
        fi
        if sshkey=$(ssh $targetsrv cat /home/$user/.ssh/authorized_keys > /dev/null 2>&1)
        then
            mkdir /home/$user/.ssh
            chmod 700 /home/$user/.ssh
            echo $sshkey > /home/$user/.ssh/authorized_keys
            chmod 600 /home/$user/.ssh/authorized_key
            chown -R $user:$user /home/$user
        fi
    fi
    echo
done