fix API docs

Author: sbernauer

README.md

@@ -610,14 +610,10 @@ OPA needs to respond with the list of groups as follows:
 
 ```json
 {
-  "result": {
-    "groups": {
-      "groups": [
-        "admin",
-        "developers"
-      ]
-    }
-  }
+  "result": [
+    "admin",
+    "developers"
+  ]
 }
 ```
 

rego/hdfs.rego

@@ -12,14 +12,7 @@ allow if {
     action_sufficient_for_operation(acl.action, input.operationName)
 }
 
-# HDFS group mapper
-# This will return the group data in this form:
-#    "result": {
-#        "groups": [
-#            "admin",
-#            "developers"
-#        ]
-#        ...
+# HDFS group mapper (this returns a list of strings)
 groups := {group |
     raw = groups_for_user[input.username][_]
     # Keycloak groups have trailing slashes

test/stack/11-rego-rules.yaml

@@ -21,14 +21,7 @@ data:
         action_sufficient_for_operation(acl.action, input.operationName)
     }
 
-    # HDFS group mapper
-    # This will return the group data in this form:
-    #    "result": {
-    #        "groups": [
-    #            "admin",
-    #            "developers"
-    #        ]
-    #        ...
+    # HDFS group mapper (this returns a list of strings)
     groups := {group |
         raw = groups_for_user[input.username][_]
         # Keycloak groups have trailing slashes