//I want to return a value in this function as efficiently as possible
    //If possible with no allocations to the heap

fn sum_all_items() -> Result<usize, &'static str> {

    if let Ok(item) = load_all_items().map(|user| user.iter().count()) {
            // Get all items in a db using the `load_all_items() function` which returns a `Result<Vec<Items>, Err>
            //Use a `map` to extract the value
            //Use `.iter().count()` on the value to count all items of the Vec
            //Here a usize is returned from calculating
        Ok(item)
    }else {

        //In case of an error, the values returned is a string
        Err("DB_READ_ERROR")
    }
}