first-login.js

function UserProvider({ children }) {
 ...
 
 Hub.listen('auth', (data) => {
   const { payload } = data;
   console.log('A new auth event has happened: ', data)

   if (payload.event === 'signIn') {
     setImmediate(() => dispatch({ type: "SET_USER", user: payload }));
     // Make an API call here to check if user has logged in
     // API.graphql(graphqlOperation(checkFirstTime(userID));

     // if no record found, set a record in the DB
     // API.graphql(graphqlOperation(logUser, input:{
     //   id: userID
     // }));
   }

   if (payload.event === 'signOut') {
     setTimeout(() => dispatch({ type: "UNAUTHORIZE" }), 350);
   }
 });
 
 ...
}