Help for coding: Tacking a planes flying time with API

import axios from 'axios';

const BASE_URL = '';

// Replace YOUR_USERNAME and YOUR_PASSWORD with your actual OpenSky Network credentials
const USERNAME = "jeangleur";
const PASSWORD = encodeURIComponent("CorrectivIsSuperCool123!");

const auth = {
  username: USERNAME,
  password: PASSWORD
};

export const fetchStates = async (icao24Array) => {
  try {
    const icao24String = (',');
    const response = await (`${BASE_URL}/states/all`, {
      auth: auth,
      params: {
        icao24: icao24String,
      },
    });
    return ;
  } catch (error) {
    ('Error fetching states:', error);
    return null;
  }
};


And in the 


[code]import React, { useEffect, useState } from 'react';
import { fetchStates } from './api';
import './';

const calculateCO2Emission = (distance) => {
  const kgCO2PerKm = 0.115; // Average CO2 emission per km
  return distance * kgCO2PerKm;
};

function App() {
  const [aircraftData, setAircraftData] = useState();
  const [co2Emission, setCO2Emission] = useState(0);

  useEffect(() => {
    // Replace this array with the ICAO24 addresses of the aircraft you want to track
    const icao24Array = ['3E17D6', '3D49DE'];

    const fetchData = async () => {
      const allData = await fetchStates(icao24Array);
      if (allData) {
        const flBschftBMVgData = ((aircraft) => {
          return aircraft[1] && aircraft[1].startsWith("GAF");
        });
        setAircraftData(flBschftBMVgData);
      } else {
        ("Error fetching aircraft data");
      }
    };

    fetchData();
  }, );

  useEffect(() => {
    const totalDistance = ((total, aircraft) => {
      // Assuming aircraft[9] is the distance traveled by the aircraft in kilometers
      return total + (aircraft[9] || 0);
    }, 0);

    setCO2Emission(calculateCO2Emission(totalDistance));
  }, [aircraftData]);



return (
  <div className="App">
    <header className="App-header">
      <h1 className="neon-title">SkySnitch</h1>
      <h2 className="neon-subtitle">Tracking Friedrich Merz' CO2 Flight Emissions</h2>
    </header>
    <main>
      <section>
        <h2>CO2 Emission Counter</h2>
        <div className="counter-container">
          <div className="counter">{(2)} kg</div>
        </div>
);
}
export default App;