When your Wordpress website has been set up and configured you will be able to access your website's dashboard to by logging in via the page located at the following URL: http://[yourdomain.com]/wp-login.php You should be presented with a page that looks like this:
On this screen enter your username and password that was sent to your email address that you provided on your client contact information. Once you have entered your User Name and Password in the specified boxes click login. The next screen should look like this:
If there are any further questions to logging into your wordpress installation you may open and submit a support ticket.