Function perseus::cache_fallible_res

pub async fn cache_fallible_res<D, E, F, Ft>(
    name: &str, 
    f: F, 
    force_run: bool
) -> Result<D, E> where
    D: Serialize + for<'de> Deserialize<'de>,
    E: Error,
    F: Fn() -> Ft,
    Ft: Future<Output = Result<D, E>>, 

Same as cache_res, but takes a function that returns a Result, allowing you to use ? and the like inside your logic.