How to use "mongoClient" without "currentUser" in realm_web SDK

My service needs to load basic information when the web loads.
(Administrators can change information at any time)

In the web SDK documentation, only logged in users can use mongoClient. ex:

app.currentUser.mongoClient(‘NAME’)

Is there a way to access the collection from the web (browser) without logging in?

The Data API doesn’t seem to be available in the browser. link