You can get EPP code at BlueHost by contacting them or following these steps:
- Login to your BlueHost account.
- Go to the Domain Manager page.
- Select the relevant domain name.
- Unlock the domain via the Lock menu.
- Turn off privacy via the Privacy menu.
- Select the Transfer EPP option to obtain your Auth code.
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.