therapiststherapists on Nostr: I logged in on nostr.com website years ago and surely used google sso to sign in ...

I logged in on nostr.com website years ago and surely used google sso to sign in because now i don't have private key and can only log in to clients that have google sso as an auth method.
Now i'm fckd if i can't retrieve it somehow because I'm trying to build a client myself and don't want to make a new account. Thread navigation on nostr.com is very bad. You can't suggest this to family and friends.