Maybe you've forgotten your password. Here's how to reset to log back in.
Click the blue login button at the top right of the forum. .
Then you'll see the login form and this:
Click "I forgot my password" and then you'll see this:
Enter your username or email and hit "reset password".
Wait a minute and then check your email. Please be sure to check your spam folder. The password reset is more likely to be there versus not sent.