const redis = require('redis');
const client = redis.createClient();

app.set('redis', client); // The middleware reads its Redis client from app

const supportedQuerystrings = {
    key: true, // Accepts all values
    complex: (value) => {} // Return a boolean
};

    const cache = expressRedisCache.create(supportedQuerystrings);

    app.use(cache);

    const cache = expressRedisCache.create('blogPosts', supportedQuerystrings);

    app.use('/blog', cache); // OR
    app.use(cache);