A query parameter would be useful, to be able to skip the landing page and go directly to the answer. With Phind, for instance, I can do `https://www.phind.com/search?q=foobar`.
Would you be OK using a Github login on stuff like this? Or would you be OK just using tokens emailed to you as a means to login? The reason I'm asking is because I don't like passwords and so designed a password-less login system that relies on emailed tokens and 2FA, with either the Authenticator app or texts.
Offering only Google leaves out the majority of small business (and big business!) coders worldwide who rely on Microsoft's small business ecosystem.
To solve in a generalized way consider OpenID Connect (OIDC) that lets you put a stack of "Sign in with [account]" or "Continue with [account]" buttons, easily.