Node: Server side cache

Greetings, my name is Rodrigo and I'm working on a project where I have three collections as shown in the image below.
The 'user' collection has user information, the 'product' collection has product information, and they have
a 1-n relationship in both ways, so a user can obtain multiple different products subscriptions
and a product may have several subscriptions from different users. To deal with this, I decide to create
another collection called 'users_subscription' to be able to handle these relationships.
The 'users_subscription' collection has an index on the 'id_product' attributes.

I have a function that is called periodically to inform me of users who have a particular subscription
product, where I pass the product id and receive an array with the data of users who have a subscription.
Below is an example of the function I am using to query the database.

My question is about using the cache in appwrite, and how do I use it in my queries, as I have
fear that when the project scales, the search time will increase significantly due to the number of documents in the collection.

The way I'm doing it, am I already using the cache? If not, how and what methods would I use to be able to
make use of the appwrite cache.

I would also like to know if there is any other approach to solving this problem.

Thank you very much for your attention!

1. Re the caching, Appwrite has caching built in. There's nothing you need to do to activate it.
2. Assuming your users and users_subscription Collections are actual users who are signing into your application, why don't you use Appwrite's built in Auth features?

Many thanks for the reply.

1. So appwrite automatically handles the data cache and it will only actually perform the query if the data has changed? Should I worry about a drop in performance if the collection becomes too large?

2. Yes, the user collection is used to deal with sign-ins, but users_subscription is used to deal with subscriptions and then it has other data such as payment methods, etc., which I removed to simplify the example.
   It was the project manager's choice to do it this way, so I'm just following orders hehe

So you're not using Auth at all? How are you handling permissions?

with proxy and api keys

So essentially you're just using Appwrite as a database?

in short yes