A firend's code to refactor

request-handler.js

const axios = require("axios");

const Endpoint = process.env.ENDPOINT;
const ApiKey = process.env.APIKEY;

export default async function handler(req, res) {
    try {
      const { username, password } = JSON.parse(req.body);
      if (req.method !== "POST") return res.status(500).json("Method not allowed");
      
      const { result } = await axios({
          method: "post",
          url: `${Endpoint}/login`,
          headers: {
            "Content-Type": "application/json",
            "API-Key": ApiKey,
          },
          data: {
            username,
            password,
          },
        })
        
      res.status(200).json(result.data);
    } catch (error) {
      res.status(500).json(error.message);
    }
}