Function get_api_key 

pub async fn get_api_key(
    __arg0: State<App>,
    __arg1: Auth,
    __arg2: Path<i64>,
    __arg3: OptionalRequestId,
) -> ClResult<(StatusCode, Json<ApiResponse<ApiKeyListItem>>)>

GET /api/auth/api-keys/{key_id} - Get a specific API key