"paths": {
            "/items/": {
                "get": {
                    "responses": {
                        "200": {
                            "description": "Successful Response",
                            "content": {"application/json": {"schema": {}}},
                        }
                    },
                    "tags": ["items"],
                    "summary": "Read Items",

        * At this point is that the API will somehow send a POST request to the
            external API with the notification of the invoice event
            (e.g. "payment successful").
    """
    # Send the invoice, collect the money, send the notification (the callback)
    return {"msg": "Invoice received"}


app.include_router(subrouter, callbacks=events_callback_router.routes)

                    "responses": {
                        "200": {
                            "content": {"application/json": {"schema": {}}},
                            "description": "Successful " "Response",
                        }
                    },
                    "summary": "A",
                }
            },
            "/b": {
                "get": {

            "/a": {
                "get": {
                    "responses": {
                        "501": {"description": "Error 1"},
                        "200": {
                            "description": "Successful Response",
                            "content": {"application/json": {"schema": {}}},
                        },
                    },
                    "summary": "A",
                    "operationId": "a_a_get",

                    "summary": "Get Users",
                    "operationId": "get_users_users__get",
                    "responses": {
                        "200": {
                            "description": "Successful Response",
                            "content": {"application/json": {"schema": {}}},
                        }
                    },
                }
            },
            "/users/{user_id}": {

                            "in": "query",
                        }
                    ],
                    "responses": {
                        "200": {
                            "description": "Successful Response",
                            "content": {"application/json": {"schema": {}}},
                        },
                        "422": {
                            "description": "Validation Error",

                                    }
                                }
                            },
                        },
                        "200": {"description": "Successful Response"},
                    },
                    "summary": "A",
                    "operationId": "a_a_get",
                }
            },
            "/b": {
                "get": {

                "summary": "Hidden Cookie",
                "operationId": "hidden_cookie_hidden_cookie_get",
                "responses": {
                    "200": {
                        "description": "Successful Response",
                        "content": {"application/json": {"schema": {}}},
                    },
                    "422": {
                        "description": "Validation Error",

                                    }
                                }
                            },
                        },
                        "204": {"description": "Successful Response"},
                    },
                    "summary": "A",
                    "operationId": "a_a_get",
                }
            },
            "/b": {
                "get": {

        "paths": {
            "/token": {
                "post": {
                    "responses": {
                        "200": {
                            "description": "Successful Response",
                            "content": {
                                "application/json": {
                                    "schema": {"$ref": "#/components/schemas/Token"}