On this page, you can reset the password for logging into the WordPress site itself as the administrative user.
Clicking this link will bring you to the normal Lost Password page of WordPress. Here, type in the username or email address associated with the site's administrative user.
Then an email will be sent to you to confirm the password reset.
Clicking the link at the bottom of that message will bring you to the page where the password reset will finally be completed.
Make sure to always choose a secure password!
After clicking "Reset Password", you will see a page like this:
Clicking that link will bring you back to the WordPress login page. From there, you should be able to log into WordPress normally with the new password.