Need help in attribute macro

#[get(path = "/billionaire")]

to

#[get(path = "/billionaire" ,type:"plain")]
pub fn get(args: TokenStream, input: TokenStream) -> TokenStream {
    let func = parse_macro_input!(input as ItemFn);
    let args = parse_macro_input!(args as MetaNameValue);
    let body = &func.block;
    let name = &func.sig.ident;
}

iterate attribute check path and value