const leftSidebarReducer = (state = initialState, action ) => {
    async function categoryQuery(json)
        await fetch('/category_query', { //post request in Server.js
            method: 'POST',
            headers: {
                "Content-Type": "application/json",
            },
            body: json //currently returns the user inputs
        })
        .then(function(response){
            return response.json(); //**Data I want in store here**
        })
        .catch(err => console.log(err));
    }

//--- Further down in the Reducer:  ---//

case actionTypes.QUERY_DB:
   var newdata = [];
   var testStr = JSON.stringify({
      cat: state.leftMenu.catDrop,
      subCat: state.leftMenu.subCatDrop,
      insCat: state.leftMenu.insDrop,
      langCat: state.leftMenu.langDrop,
    });
    categoryQuery(testStr) //Run the async function above with state values
    return {
       ...state,
       data: newdata //Where the data should be updating ***
    }

app.post('/category_query', (req, res) => { //this is the main category query
  console.log(req); //this is an attempt to see if we receive the reqs
  db.any(
  `SELECT * FROM med_services
      WHERE cat_name = $1 AND subCat = $2 AND insurance = $3`
      ,['Medical Care', 'clinic', 'blue-cross']
       //normally would be [req.body.cat, req.body.subCat, req.body.insCat]
   )
    .then(data => {
        console.log('DATA:', data); // print data;
        res.send(data);
        console.log('category query sent successfully')
    })
    .catch(error => {
        res.send('Error processing query');
    })
});