How to enter authentication credential to to secure site in chrome browser

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#1
  1. Lanching one secure site in chrome browser.
  2. pop up comes saying " Your Connection to this site is not private" asking to enter username and password.
  3. that pop is not found in html source code. it is part of /html/body. No element is spy-able in that pop up when opened in chrome.
  4. In UFT Wscript.Sendkeys to enter credential and to submit and proceed.

Unable to handle with Katalon!!
Looking for support. Badly stuck at the initial step :frowning:

Regards
Madhumita