feat: Update swagger to openapi 3.0.4, update request payloads with examples (#11374)

swagger/paths/platform/account_users/delete.yml

@@ -5,23 +5,18 @@ summary: Delete an Account User
 description: Delete an Account User
 security:
   - platformAppApiKey: []
-parameters:
-  - name: data
-    in: body
-    required: true
-    schema:
-      type: object
-      required:
-        - user_id
-      properties: 
-        user_id:
-          type: integer
-          description: The ID of the user
-
 responses:
-  200:
+  '200':
     description: Success
-  401:
+  '401':
     description: Unauthorized
-  404:
+    content:
+      application/json:
+        schema:
+          $ref: '#/components/schemas/bad_request_error'
+  '404':
     description: The account does not exist
+    content:
+      application/json:
+        schema:
+          $ref: '#/components/schemas/bad_request_error'