How to get params from AuthorizationHandler .NET Core

I am using an authorization handler to put custom authorization in my controller in .net core. How can I get the parameters from the controller and use it to the authorization handler?

In the old .NET I can get the parameters from HttpContext request param like this:

var eventId = filterContext.RequestContext.HttpContext.Request.Params["id"];

I am not sure how can I achieved it in .net core

public class HasAdminRoleFromAnySiteRequirement : AuthorizationHandler<HasAdminRoleFromAnySiteRequirement>, IAuthorizationRequirement
{
    public HasAdminRoleFromAnySiteRequirement()
    {

    }

    protected override Task HandleRequirementAsync(AuthorizationHandlerContext context,
        HasAdminRoleFromAnySiteRequirement requirement)
    {   

    //need to call get param from controller to used in the validation
    // something like this 
    //var eventId = filterContext.RequestContext.HttpContext.Request.Params["id"];
   // I tried the suggestion below but I can't get the parameter from routedata
   // var mvcContext = context.Resource as     Microsoft.AspNetCore.Mvc.Filters.AuthorizationFilterContext;            

        return Task.FromResult(0);
    }
}