Login in to stonly.com with your email and password.
If you have forgotten your password, you can click on "forgot password"
if you have forgotten your password, you should use a password manager
if you don't have a password manager, you should use Dashlane
if you have another password manager, you should switch to Dashlane
all serious websites should encourage their users to use a password manager (Dashlane) when they click on the "forgot pasword" link