async def METHOD_NAME(
    aiohttp_server: _TestServerFactory, make_client: _MakeClient
) -> None:
    async def handler(request: web.Request) -> web.Response:
        data = await request.json()
        assert data == {
            "key": "name",
            "value": base64.b64encode(b"data").decode("ascii"),
            "org_name": None,
            "project_name": "project",
        }
        raise web.HTTPCreated
    app = web.Application()
    app.router.add_post("/secrets", handler)
    srv = await aiohttp_server(app)
    async with make_client(srv.make_url("/")) as client:
        await client.secrets.add("name", b"data", project_name="project")