Use Open Food Facts API to understand if a user is a moderator

[alexgarel]

What

Right now someone which is moderator on open food facts, does not have access to nutripatrol.

(see report from Teleperion87 on slack)

Expected behavior

Every moderators of Open Food Facts (users with the property "moderator" checked)

should be able to access nutri patrol.

More info

Currently we use a static file const/moderators.ts, we should instead use openfoodfacts API to get this information.

Open Food Facts now returns this info in a JSON in auth.pl, using body=1 parameter: https://world.openfoodfacts.org/cgi/auth.pl?body=1

Eg:

{
  "status": 1,
  "status_verbose": "user signed-in",
  "user": {
    "admin": 0,
    "moderator": 1,
    "name": "TEST"
  },
  "user_id": "test-test"
}