Adding reference to opa user-info-fetcher

Author: Maleware

docs/modules/superset/pages/usage-guide/security.adoc

@@ -134,6 +134,8 @@ In order to map roles from Opa into superset, we expect rego rules with a rule n
 
 IMPORTANT: Only role mapping is enabled. Permissions can only be added through the Superset UI. RBAC through OPA is not implemented.
 
+OPA rules can be synced using the xref:opa:usage-guide:user-info-fetcher[user-info-fetcher].
+
 [source,yaml]
 ----
 apiVersion: v1
@@ -155,7 +157,7 @@ data:
         roles := user.roles
         user.username == input.username
     }
-
+# TODO: User opainfofetcher()
     users := [
         {"username": "admin", "roles": ["Admin", "Test"]},
         {"username": "testuser", "roles": ["El_Testos", "Custom2"]}
@@ -182,7 +184,7 @@ spec:
 ----
 
 <1> ConfigMap name containing rego rules
-<2> Mandatory Opa caching. Reduces calls to OPA API.
+<2> Mandatory Opa caching. If not set, default settings apply.
 <3> Time for cached entries per user can live. Defaults to 30s.
 <4> Number of maximum entries, defaults to 1000. Cache will be disabled for maxEntries: 0.