Google analytics api and user defined variables

I'm trying to download the 'User Defined' variables using the google analytics API. The login is working and it properly shows normal requests like the one below, but I can't figure out how to extract the user defined variable data.

USER_EMAIL="my@email.tld" #Insert your Google Account email address here
USER_PASS="mypassword" #Insert your password here
TABLE_ID="ga:12345my_t_id" #Insert your table ID here (ie ga:1234)

    googleAuth="$(curl https://www.google.com/accounts/ClientLogin -s \
      -d Email=$USER_EMAIL \
      -d Passwd=$USER_PASS \
      -d accountType=GOOGLE \
      -d source=curl-dataFeed-v2 \
      -d service=analytics \
      | awk /Auth=.*/)"

    feedUri="https://www.google.com/analytics/feeds/data\
    ?ids=$TABLE_ID\
    &start-date=2010-04-04\
    &end-date=2011-07-07\
    &dimensions=ga:source,ga:medium\
    &metrics=ga:visits\
    &sort=-ga:visits\
    &filters=ga:medium%3D%3Dreferral\
    &max-results=5\
    &prettyprint=true"

    curl $feedUri --silent \
      --header "Authorization: GoogleLogin $googleAuth" \
      --header "GData-Version: 2开发者_如何学JAVA"

The user defined variable is the complete referral URL by the way.

EDIT: I FIGURED IT OUT, ga:userDefinedValue using the analytics data explorer, add a comment if you want the reward!:

http://code.google.com/apis/analytics/docs/gdata/gdataExplorer.html

---

This is being deprecated.

You should use ga:customVarName(n)