Macro query 

macro_rules! query {
    ( $s:expr $(, $ro:literal)?) => { ... };
    ( $s:expr, { $( $k:expr => $v:expr ),* } $(, $ro:literal)?) => { ... };
}

Macro for creating a GraphQuery

Diffrent usecases

query!("query string"); // Normal query
query!("query string", true); // Normal read only query
query!(
    "query string $param",
    {
        "param" => 5 // or "Some string" or 4.8 everything is converted with Parameter::from
    }
); // Query with parameters and read only
query!(
    "query string $param $name",
    {
        "param" => 5,
        "name" => "username"
    },
    true
); // Query with parameters and read only