Pass user name password in apache proxy

[elgo]

I have setup a proxy server, I want to create a user name password for a backend application to authenticate, but I don't want the browser to prompt instead the proxy should read from a file where I store username password, and if both match it pass through to the backend application.

I have already tried this solution, did not work.

<Location />
<Limit GET PUT POST>
AuthType Basic
AuthName test
AuthUserFile /<proxy-install-dir/passwd
Require user user
</Limit>
</Location>

Any idea how I can do that.