What is username and password for this link http://localhost:1947/_int_/ACC_help_index.html

What sort of license do you have, 

• SmartBear ID-based -  A new license type that doesn’t use license keys but requires a user to specify their SmartBear account to run the product.
• Key-based - A legacy license type that implies using a license key from SmartBear. You enter that key on your computer to activate the license, or you consume the license from the license server that is running in your network and that is licensed with this key

See About TestComplete Licenses