Using Upollo to Detect Account Sharing and Repeated Trials with auth0 & React

<Route path="/login-success" component={LoginSuccessPage} />

import { useAuth0 } from "@auth0/auth0-react";
import { EventType, FlagType, UpolloClient } from "@upollo/web";
import { useEffect } from "react";
import { useHistory } from "react-router-dom";

const LoginSuccessPage = () => {
  const { user, isAuthenticated } = useAuth0();
  const history = useHistory();

  // Query Upollo when the page loads
  useEffect(() => {
    // Auth0 should be authenticated at this point.
    if (isAuthenticated) {
      const upollo = new UpolloClient("YOUR_UPOLLO_API_KEY");
      upollo
        .assess(
          {
            userEmail: user.email,
            userName: user.name,
            userImage: user.picture,
            userPhone: user.phone_number,
          },
          EventType.EVENT_TYPE_LOGIN_SUCCESS
        )
        .then((identifyResponse) => {
          const flagTypes = identifyResponse.flags.map((flag) => flag.type);
          if (flagTypes.includes(FlagType.ACCOUNT_SHARING)) {
            // The user was account sharing let them know
            // they should create their own account.
          }
          if (flagTypes.includes(FlagType.REPEATED_SIGNUP)) {
            // The user has already signed up previously,
            // don't offer a free trial.
          }
          // Continue on now that the user is logged in
          history.replace("/");
        });
    }
  }, []);
  return null;
};

export default LoginSuccessPage;