In Station, you have 2 ways to sign-up and login
Via Google
Via an email/password combination
The thing is, those 2 methods are totally independent from each other meaning that:
If you try to log in via email/password when you signed-up via Google, it won't work and you won't be able to log in.
If you try to reset your password when you signed-up via Google, it won't work and you won't receive any email.
If you wish to access your account via both methods, you must sign-up twice: once via Google and once by creating an email/password combination.
Most of the issues you'll encounter when logging in are linked to using to wrong authentication method, mostly trying an email/password combination when you've signed up using Google.
If you're stuck, just try logging in via Google or signing-up for a new account.