#!/bin/bash

source=$(cat $1)
counter=0;
username="";
login="";
password="";
while IFS='' read -r line || [[ -n "$line" ]]
do
    let "counter += 1"
    if [[ counter -eq 1 ]]
    then
        username=$line
    elif [[ counter -eq 2 ]]
    then
        login=$line
    else
    then
        password=$line
        adduser $login --gecos "$username" --disabled-password && echo "$login:$password" | chpasswd

        username=""
        login=""
        password=""
        let "counter = 0"
    fi
done < "$1"