@Sparky672 figured out my best option after forgetting the password was to log in with my linked tp-link account, backup the router, factory reset it, create a new password and upload the backup data...

@Sparky672 just bought an Archer AX50, spent most of the day trying to set up an smtp before finding this, tried google, icloud, outlook, this doesnt work and shouldnt be a feature in the manuals...