schema: fixup user

Author: Zash

config/schemas/config.yaml

@@ -433,33 +433,18 @@ properties:
     additionalProperties:
       $ref: '#/$defs/commonResource'
     properties:
-      alertmanager:
-        additionalProperties:
-          $ref: '#/$defs/commonResource'
-        properties:
-          adminGroups:
-            items:
-              type: string
-            type: array
-          adminUsers:
-            items:
-              type: string
-            type: array
-          enabled:
-            default: true
-            type: boolean
-          ingress:
-            additionalProperties: false
-            properties:
-              enabled:
-                default: false
-                type: boolean
-            type: object
-          serviceAccounts:
-            items:
-              type: string
-            type: array
-        type: object
+      adminGroups:
+        minItems: 1
+        items:
+          type: string
+        type: array
+      adminUsers:
+        minItems: 1
+        items:
+          examples:
+            - admin@example.com
+          type: string
+        type: array
       constraints:
         additionalProperties:
           additionalProperties:
@@ -495,6 +480,15 @@ properties:
             - staging
           type: string
         type: array
+      serviceAccounts:
+        items:
+          type: object
+          properties:
+            name:
+              type: string
+            namespace:
+              type: string
+        type: array
     type: object
   hnc:
     additionalProperties: false