Google App Scripts authorization authorization

Just try playing with google app scripts. Everything looks fine in anonymous mode. Except that anyone can call my script just like this snippet shows:

curl "https://script.google.com/macros/s/.../exec?ip=\"$myIp\""

      

        
        
        
      

    

I used this tutorial to find out how to authenticate with GoogleLogin. The problem is that the "401 unauthorized" I got when the authentication token was sent and the "I (owner) / Myself only" options were set on google side. (The token itself seems to be correct. If I omit the password or am wrong, I get "Bad auth"). If I set "Anyone, even anonymous" again, it works, but the auth file seems to be ignored. What's the correct way to do the trick?

#!/bin/bash
gmail=$1
password=$2
myIp=$3
GoogleAuthToken=""
GoogleAuthToken=`curl --silent https://www.google.com/accounts/ClientLogin --data-urlencode Email=$gmail \
--data-urlencode Passwd=$password -d accountType=GOOGLE -d source=YouDontSay -d service=lh2`
echo $GoogleAuthToken
GoogleAuthToken=$(echo "$GoogleAuthToken" | grep 'Auth=' | sed  s/Auth=//)
echo $GoogleAuthToken 
curl -L --silent --header "Authorization: GoogleLogin auth=$GoogleAuthToken" "https://script.google.com/macros/s/.../exec?ip=\"$myIp\""