Looks like, It is authentication pop up. You can refer below information over the forum if it helps. I have doubt , it can directly send string to the text.
You may need to use AutoIT or Robot class to deal with it.
https://docs.katalon.com/katalon-studio/docs/using-autoit-for-authentication-in-katalon-studio.html
Just for the curiosity purpose- Did you check below stuff (Few yeas back, it has worked for me)
You can provide credentials in URL itself it means we will add username and password in URL so while running script it will bypass the same.
Syntax
Example :
http://priyank:password@www.xyz.com
**Other guess: **
- Try:
'Open browser and navigate to demo AUT site.'
WebUI.openBrowser('')
'Input username and password on authentication dialog.'
WebUI.authenticate('http://url', 'username', 'password', 12)
- what about if we create firefox / chrome profile where you can provide this authentication and ask katalon to load profile at runtime? - It has also worked with selenium in past. However, not tried with katalon.