Sync fastapi docs from 50fa3f7c on 2026-01-11

docs_src/openapi_webhooks/tutorial001_py39.py

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+from datetime import datetime
+
+from fastapi import FastAPI
+from pydantic import BaseModel
+
+app = FastAPI()
+
+
+class Subscription(BaseModel):
+    username: str
+    monthly_fee: float
+    start_date: datetime
+
+
+@app.webhooks.post("new-subscription")
+def new_subscription(body: Subscription):
+    """
+    When a new user subscribes to your service we'll send you a POST request with this
+    data to the URL that you register for the event `new-subscription` in the dashboard.
+    """
+
+
+@app.get("/users/")
+def read_users():
+    return ["Rick", "Morty"]