How can I pass the ID of logged-in user in the axios.get method in react-redux?

Question

I am new to react-redux,when I was developing an express app in which I choose react as my frontend and redux store concept.
I need to pass the logged in user as a param in my axios.get method How can i do this?

What I have been doing is getting the user._id from database and using it but this approach is tedious and will not work for a number of users

  componentDidMount(){
        const url="http://localhost:5000/api/users/viewFarm/5d3ac84a86688123789e13b2";
        fetch (url,{
            method: "GET"
        }).then(response=> response.json()).then(result=>{
            console.log(result);

           this.setState({
            farmList : result
           }); 
        });
  }

I can see in Redux Dev Tool the SET_CURRENT_USER is displaying the logged in user but is there any other way so that I can pass this user.id in the axios.get method while doing ComponentDidMount(). 1. My react-redux have authActions

//Json Generator
export const registerJson = (userData, history) => dispatch => {
  axios
    .post("/api/users/registerJson/5d3ac84a86688123789e13b2/5d42d171e7ceef2a90245470/5d44256d8b3cf92af46e2c9b", userData)
    .then(res => history.push("/JsonGenerator"))
    .catch(err =>
      dispatch({
        type: GET_ERRORS,
        payload: err.response.data
      })
    );
};
.
.
.
.
export const setCurrentUser = decoded => {
  return {
    type: SET_CURRENT_USER,
    payload: decoded
  };
};

2. Reducers

import { SET_CURRENT_USER, USER_LOADING } from "../actions/types";

const isEmpty = require("is-empty");

const initialState = {
  isAuthenticated: false,
  user: {},
  loading: false
};

export default function(state = initialState, action) {
  switch (action.type) {
    case SET_CURRENT_USER:
      return {
        ...state,
        isAuthenticated: !isEmpty(action.payload),
        user: action.payload
      };
    case USER_LOADING:
      return {
        ...state,
        loading: true
      };
    default:
      return state;
  }
}

3. Store

import { createStore, applyMiddleware, compose } from "redux";
import thunk from "redux-thunk";
import rootReducer from "./reducers";

const initialState = {};

const middleware = [thunk];

const store = createStore(
  rootReducer,
  initialState,
  compose(
    applyMiddleware(...middleware),
    window.__REDUX_DEVTOOLS_EXTENSION__ && window.__REDUX_DEVTOOLS_EXTENSION__()
  )
);

export default store;

Redux dev tool o/p

{
auth:{
   isAuthenticated:false=>true}
   user:{
   exp:1604591134,
   iat:1573034208,
   id:"5d36f73f67665a1740620f55",
   name:"Pritam Kumar",
   },
 }
}

Answer 1

In the URL, you can append as a query parameter

Answer 2

You can use query strings.

componentDidMount(){
        const data = this.state.data //i put state data for example you can use any data source
        const url=`http://localhost:5000/api/users/viewFarm/?userId=${data._id}`;
        fetch (url,{
            method: "GET"
        }).then(response=> response.json()).then(result=>{
            console.log(result);

           this.setState({
             farmList : result
           }); 
        });
  }

and in your nodejs app

app.get('/api/users/viewFarm/', (req,res)=>{
    //you can use router instead of app
    console.log(req.query.userId)
})