[HELP] external database

hello everyone,
Can somebody help me setup external database using firestore?
I’ve read the Wix instructions but that didn’t made the magic.
https://support.wix.com/…/corvid-working-with-external-data…

The site traffic using http-api’s to store data from systems around the world, increased massively, so i need to have a database that can keep grow beyond the maximum 50GB wix has to offer and keep increase it with traffic.

i’m about to add a deletion mechanism in order to delay a bit the problem, but as far as the business hopefully will keep growing, this will eventually be a bottleneck that i want to avoid before the crisis.

i’ve created a firestore service, and collection, i can see them in the editor in the databases section but something is just missing, as when im trying to send data using a test http-function i get ‘200’ but no data is being enterd to the db…

more specifically, how do i use this:

Insert Item

POST

data/insert

PAYLOAD
{ collectionName: string, items: Item requestContext: RequestContext }

from the documenttion.

Moreover, is there any way to know how much space is being utilized by each collection we use and how much space left?
any option to get that keep growing inside wix?

Any support welcomed

thanks