If you forget the password you need to access the WordPress dashboard you can easily change it to a new one by following the steps below.
1. From the login page click the “Lost your password?” link near the bottom of the screen.
2. Enter your email address and click the [Get New Password] button.
3. Check your email for a message sent from your website, and when it arrives click the link to rest your password.
4. Enter a new password then click the [Reset Password] button. You should now be able to log in with your new username and password.