You can get EPP code at GoDaddy by contacting them or following these steps:
- Login to your GoDaddy account.
- Go to the Domain Settings page.
- Once you are there, select Get Authorization Code menu located in the Additional Settings section.
Completing these actions you will receive an email with your domain authorization code in just a few minutes. Now you will be able to transfer your domain to Hostinger :)
NOTE: You can also check this article for more information about the EPP code.