IndexTank: why does InstantSearch ask me for a username and password?

I downloaded the tarball from the IndexTank JQuery Github page and extracted the archive as the instructions told me to.

I edited the test.html file and added my IndexTank public API URL and also my index name as per the instructions.

Then I opened the test.html file in Chrome and tried to use the search field.

So, my ques开发者_如何学Gotion is this:

Why, everytime I search for something, am I prompted with a browser popup asking me to enter in my username and password?

You need to go to your dashboard, click on Manage for your index and enable Public Search API. The option is right below the scoring functions.