measurement protocol - Redirect of my web page what about tracking code in google analytics -

i have put tracking code of google analytics in website example.com

so tracking code ga('create', 'ua-xxxxxxxxx', 'example.com');

after redirect website home.com

so have change tracking code ga('create', 'ua-xxxxxxxxx', 'home.com');

my google analytics account refers ga('create', 'ua-xxxxxxxxx', 'auto');

what should put?