How to use the swagger-stats.getMiddleware function in swagger-stats

secret: process.env.SESSION_SECRET,
        maxAge: 7 * 24 * 60 * 60 * 1000,
        secureProxy: true
    }));
    app.use(cookieParser());
    app.use(bodyParser.json());
    app.use(bodyParser.urlencoded({
        extended: true
    }));

    const dbInfo = require('./database')();

    require('./swagger')(app, cors);
    app.use('/api/docs', cors(), express.static('./node_modules/swagger-ui-dist'));

    app.use(swStats.getMiddleware({
        swaggerSpec: require('../swagger'),
        apdexThreshold: 250,
        authentication: true,
        onAuthenticate: (req, username, password) => {
            return username.toLowerCase() == process.env.USERNAME.toLowerCase() && password == process.env.PASSWORD
        }
    }));

    app.use(postgraphile(dbInfo.connectionString, 'public', {
        disableDefaultMutations: true,
        graphiql: true
    }));

    let corsConfig = cors(corsOptions);
    require('../app/coach/coach.route')(app, dbInfo.db, corsConfig);
    require('../app/game/game.route')(app, dbInfo.db, corsConfig, speedLimiter);

beforeNext: async server => {
    const app = new serverApp.DofapiApplication();
    await app.boot();
    server.use(swStats.getMiddleware({ swaggerSpec: apiSpec }));
    server.use('/', app.requestHandler);
  },
});

const Koa = require('koa');
const bodyParser = require('koa-bodyparser');
const cors = require('@koa/cors');
const swStats = require('swagger-stats');
const e2k = require('express-to-koa');
const fx = require('./fx');

const app = new Koa();

app.use(e2k(swStats.getMiddleware({})));
app.use(cors({
  origin: '*',
}));
app.use(bodyParser());
app.use(fx);

app.listen(3000);