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

SuperTokens.com

I need to redirect to '/hello' on successfull login

can i see the config you have provided on the frontend?

Something like {
    appInfo,
    recipeList: [
      EmailPasswordReact.init({
        palette: {
          primary: PRIMARY_COLOR_LIGHT_MODE,
          textLink: PRIMARY_COLOR_LIGHT_MODE,
          error: ERROR_COLOR_LIGHT_MODE,
        },
      }),
      SessionReact.init(),
    ],
  }

export const appInfo = {
    // learn more about this on https://supertokens.com/docs/passwordless/appinfo
    appName: 'APP_NAME',
    apiDomain: API_URL,
    websiteDomain: WEB_APP_URL,
    apiBasePath: '/auth',
    websiteBasePath: '/auth',
  };

Have a look at this: https://supertokens.com/docs/emailpassword/common-customizations/redirecting-post-login