app = FastAPI()
    router = APIRouter()


    @router.get("/users/", tags=["users"])
    async def read_users():
        return [{"username": "Rick"}, {"username": "Morty"}]


    app.include_router(router)
    ```
    """

    def __init__(
        self,
        *,
        prefix: Annotated[str, Doc("An optional path prefix for the router.")] = "",

Por ejemplo, esto no está permitido:

```Python
q: Annotated[str, Query(default="rick")] = "morty"
```

...porque no está claro si el valor por defecto debería ser `"rick"` o `"morty"`.

Así que utilizarías (preferentemente):

```Python
q: Annotated[str, Query()] = "rick"
```

...o en code bases más antiguas encontrarás:

Par exemple, ceci n’est pas autorisé :

```Python
q: Annotated[str, Query(default="rick")] = "morty"
```

... parce qu’il n’est pas clair si la valeur par défaut doit être « rick » ou « morty ».

Donc, vous utiliseriez (de préférence) :

```Python
q: Annotated[str, Query()] = "rick"
```

def test_users_token_jessica(client: TestClient):
    response = client.get("/users?token=jessica")
    assert response.status_code == 200
    assert response.json() == [{"username": "Rick"}, {"username": "Morty"}]


def test_users_with_no_token(client: TestClient):
    response = client.get("/users")
    assert response.status_code == 422
    assert response.json() == {
        "detail": [
            {

```Python
from fastapi import Depends, FastAPI, HTTPException
from typing_extensions import Annotated

app = FastAPI()


data = {
    "plumbus": {"description": "Freshly pickled plumbus", "owner": "Morty"},
    "portal-gun": {"description": "Gun to create portals", "owner": "Rick"},
}


class OwnerError(Exception):
    pass


def get_username():
    try:
        yield "Rick"

32B6          ; mapped                 ; 0034 0031     # 3.2  CIRCLED NUMBER FORTY ONE
32B7          ; mapped                 ; 0034 0032     # 3.2  CIRCLED NUMBER FORTY TWO
32B8          ; mapped                 ; 0034 0033     # 3.2  CIRCLED NUMBER FORTY THREE
32B9          ; mapped                 ; 0034 0034     # 3.2  CIRCLED NUMBER FORTY FOUR

thought to herself.

  At this moment the King, who had been for some time busily
writing in his note-book, cackled out `Silence!' and read out
from his book, `Rule Forty-two.  ALL PERSONS MORE THAN A MILE
HIGH TO LEAVE THE COURT.'

  Everybody looked at Alice.

  `I'M not a mile high,' said Alice.

  `You are,' said the King.

thought to herself.

  At this moment the King, who had been for some time busily
writing in his note-book, cackled out `Silence!' and read out
from his book, `Rule Forty-two.  ALL PERSONS MORE THAN A MILE
HIGH TO LEAVE THE COURT.'

  Everybody looked at Alice.

  `I'M not a mile high,' said Alice.

  `You are,' said the King.