Thanks for updating and contributing, hope it will help others with similar error.

well… the folder name i put earlier was /public_html/htpasswds/passcode which was actually incorrect.
Then i used the original one “/home/abidpasha/public_html/htpasswds/passcode” and it worked. below was the result with incorrect directory name (my problem is solved now) Thank you :)

1. I entered wrong id pw it replied with the same error “redirect loop”
2. I clicked “cancel” it replied:
Unauthorized

This server could not verify that you are authorized to access the document requested. Either you supplied the wrong credentials (e.g., bad password), or your browser doesn’t understand how to supply the credentials required.

Please try these first and tell me the results:

1. try entering the wrong username / password, does it popup the login box again normally?
2. click cancel, which page it leads to and what does it say?
3. copy and paste your code block here please

done with this.. now new problem… when i go to mysite.com/wp-login.php it asks for username and password.. I put both correct then… Chrome shows me this message:

The webpage at mysite.com/wp-login.php has resulted in too many redirects. Clearing your cookies for this site or allowing third-party cookies may fix the problem. If not, it is possibly a server configuration issue and not a problem with your computer.

Abid filename has to be “passwd” or anything you want (with or without file extension). You can have any directory path (better to have it in . / dot named folder like .htpasswds outside the main root directory. But make sure you add the same exact name in the .htaccess AuthUserFile, e.g.:

AuthUserFile “/home/path/.htpasswds/public_html/passwd”