Jokes on you (us), there's not a way to reset your password, across all three of openai's applications.
Yes there is. They use Auth0 for authentication, so they would have to pour some effort in for this to not be possible. Just go to the login page and select "Forgot your password?" and reset it that way.
I think OpenAI uses Stripe for CC processing so I don't believe user's cards should be at risk.
Am I at risk if I connect through Google or Apple API ?
If your Google or Apple account is hacked then yes. If not, then no.