Hello Bapan, Welcome to BengalSpider.com. I appreciate your involvement with this website. As you have mentioned that Sign In option/link is not easy, I was shocked. I think the Sign In link is there in every page of BengalSpider. You can get the link at the Left Side of your monitor.
Another thing is that member should get things easily if he/she is an Active Member and does Login every now and then. Bapan you should Log In regularly to BengalSpider, so that you get much more familiar with site.Thanks