payment.resource.ts

`import useSWR from 'swr';
import { openmrsFetch, useConfig } from '@openmrs/esm-framework';
import { BillingConfig } from '../../config-schema';
import { Buffer } from 'buffer';
import axios from 'axios';

type PaymentMethod = {
uuid: string;
description: string;
name: string;
retired: boolean;
};

const swrOption = {
errorRetryCount: 2,
};

export const usePaymentModes = () => {
const { excludedPaymentMode } = useConfig();
const url = /ws/rest/v1/cashier/paymentMode;
const { data, isLoading, error, mutate } = useSWR<{ data: { results: Array } }>(
url,
openmrsFetch,
swrOption,
);
const allowedPaymentModes =
excludedPaymentMode?.length > 0
? data?.data?.results.filter((mode) => !excludedPaymentMode.some((excluded) => excluded.uuid === mode.uuid)) ?? []
: data?.data?.results ?? [];
return {
paymentModes: allowedPaymentModes,
isLoading,
mutate,
error,
};
};

export const generateStkAccessToken = async () => {
try {
const consumerKey = '';
const consumerSecret = '';
const authorizationUrl = 'https://sandbox.safaricom.co.ke/oauth/v1/generate?grant_type=client_credentials';
const auth = Buffer.from(${consumerKey}:${consumerSecret}).toString('base64');
const headers = {
'Content-Type': 'application/json',
Authorization: Basic ${auth},
};
const response = await axios(authorizationUrl, { method: 'GET', headers });
const { access_token } = await response.data;
return access_token;
} catch (error) {
console.error(error);
}
};

export const initiateStkPush = async (payload) => {
try {
const access_token = await generateStkAccessToken();
const initiateUrl = 'https://sandbox.safaricom.co.ke/mpesa/stkpush/v1/processrequest';
const response = await axios.post(initiateUrl, payload, {
headers: {
'Content-Type': 'application/json',
Authorization: Bearer ${access_token},
},
});
return response.data;
} catch (error) {
console.error(error);
throw error;
}
};`

webpack.config.js
module.exports = require('openmrs/default-webpack-config');

I want to using dotenv on the payment.resource.ts