SuperTokens is an open source authentication solution offering features like: Different types of login: Email / password, Passwordless (OTP or Magic link based).

SuperTokens.com

Is there any difference between calling `signUp`/`signIn` vs. using the pre-defined Express routes?

The api does input validation (checks for email syntax and password strength), calls the signUp / signIn function and also creates a new session

Okay. So if I run `signUp`, I'm not guaranteed to get a check for password strength, and the user will have to login?

Okay. That's helpful to know. Is there a function that does the strength check for us?

not really. You can see the default strength check here: https://github.com/supertokens/supertokens-node/blob/master/lib/ts/recipe/emailpassword/utils.ts#L211

Thanks for the help as always! 😅 🙏🏿