It is not uncommon for users to create multiple accounts and forget which one is their primary account.
The forums for Vape are an entirely separare login. Do not attempt to use your forums login on the Vape website - it will not work. Only use the same login credentials that you use for vape.gg/login.
To recover your password, click this link and enter your credentials. If you have issues finding the email, look in your spam and junk mail bins.