Function grin_api::client::post_no_ret

pub fn post_no_ret<IN>(
    url: &str, 
    api_secret: Option<String>, 
    input: &IN
) -> Result<(), Error> where
    IN: Serialize, 

Helper function to easily issue a HTTP POST request with the provided JSON object as body on a given URL that returns nothing. Handles request building, JSON serialization, and response code checking.