action.js

action.js

import axios from 'axios';

import  {AUTH_USER, UNAUTH_USER, AUTH_ERROR} from  './types';
import authError from './error';


const ROOT_URL = 'http://localhost:3000/';  // url to api

export default function signinUser(email,password) {
  return function(dispatch) {
    
    // Submit email/password to the server
    axios.post(`${ROOT_URL}signin`, { email, password })   //make api call and returns a promise
      .then((response) => {
        //update state
        dispatch({      // once returned dispatch to your reducers
          type: AUTH_USER
        });
       
      })
      .catch((err) => {
        dispatch(authError('I can\'t find you ... Please try again'));   // catch any errors
      });
  };  
}