Whenever you connect to HipTest from TestComplete, the latter asks you to specify your HipTest account and password. The values you specify depend on how you sign in to HipTest:
... you use the email and password you specified for this account.
... you use special API credentials that you can get from HipTest:
Log in to HipTest using your GitHub or Google account.
Go to your profile settings (https://app.hiptest.com/profile).
In the API Credentials section of the Profile page, click Generate new API credentials:
Copy the Access token, Client ID and UID values to TestComplete. The latter will store these values and use them for logging in to HipTest: