Also adding my frontend code here since I was limited in characters above:

try {
    const response = await signUp({
      formFields: [
        {
          id: "email",
          value: email,
        },
        {
          id: "password",
          value: password,
        },
      ],
    });

    if (response.status === "FIELD_ERROR") {
      // one of the input formFields failed validation
      response.formFields.forEach((formField) => {
        if (formField.id === "email") {
          // Email validation failed (for example incorrect email syntax),
          // or the email is not unique.
          window.alert(formField.error);
        } else if (formField.id === "password") {
          // Password validation failed.
          // Maybe it didn't match the password strength
          window.alert(formField.error);
        }
      });
    } else if (response.status === "SIGN_UP_NOT_ALLOWED") {
      // this can happen during automatic account linking. Tell the user to use another
      // login method, or go through the password reset flow.
    } else {
      // sign up successful. The session tokens are automatically handled by
      // the frontend SDK.
      window.location.href = "/homepage";
    }
  } catch (err: any) {
    if (err.isSuperTokensGeneralError) {
      // this may be a custom error message sent from the API by  you.
      window.alert(err.message);
    } else {
      window.alert("Oops@ Something went wrong.");
    }
  }