phpBB comments

Hi.

I am looking for a way to write in your phpBB username and password when posting a comment and when submitted, it checks for a match in the phpBB user-table and the comment gets postet. If no match, you get an error.

Anyone know how to do this? It would work kind of like Facebook-comments I can imagine.

I dont want a bridge or something more than just the comments. It gives me so much unnecessary and opens up for other problems. I have tested it, and I really dont like it.

Thanks for answers! ??