src/Sonic/Routing/Router.php
public function post($route, $callback)
    {
        $this->route(new Route($route, $callback), self::METHOD_POST);
    }
public function post($route, $callback)
    {
        $this->route(new Route($route, $callback), self::METHOD_POST);
    }
Add HTTP POST route

@see    Router::route()
@param  string                $route
@param  array|\Closure|string $callback