Policy based authorization that needs to evaluated on the ocelot gateway project supported?

[gurutcr]

I am developing a micro services based application using ocelot as API gateway. When incoming requests come to the ocelot, it will call an authentication service that will return a JWT token upon successful authentication. Now before it calls the downstream API, I need to check some things to allow that call or not. For this I think the following middleware code is needed in the ocelot startup.cs.

            var configuration = new OcelotPipelineConfiguration
            {
                AuthorisationMiddleware = async (ctx, next) =>
                {
                    // How can I configure the policy name for the ReRoute
                    string policyName = "AtLeast21";
                    IAuthorizationService authorizationService = ctx.HttpContext.RequestServices.GetService<IAuthorizationService>();
                    var result = await authorizationService.AuthorizeAsync(ctx.HttpContext.User, "somejunk", policyName);
                    if (result.Succeeded)
                    {
                        await next.Invoke();
                    }
                    else
                    {
                        ctx.Errors.Add(new UnauthorisedError($"Fail to authorize policy: {policyName}"));
                    }
                }
            };
            await app.UseOcelot(configuration);

Now, the above middleware will call the AuthorizationHandler below before calling the downstream api.

    public class OfficeAccessHandler : AuthorizationHandler<OfficeAccessRequirement,object>
    {
        IHttpContextAccessor httpContextAccessor = null;
        public OfficeAccessHandler(IHttpContextAccessor httpContextAccessor)
        {
            this.httpContextAccessor = httpContextAccessor;
        }
        protected override async Task HandleRequirementAsync(AuthorizationHandlerContext context, OfficeAccessRequirement requirement,object test)
        {
            HttpContext httpContext = httpContextAccessor.HttpContext;
            //How do I get the Claims here from the JWT token?
            //var isSuperAdmin = bool.Parse(httpContext.User.FindFirst("OfficeUser").Value);
            var isSuperAdmin = true;

            if (isSuperAdmin == true)
            {
                context.Succeed(requirement);
                return;
            }
            else
            {
                context.Fail();
                return;
            }
        }
    }

I need to get the claims and user details from the JWT token returned by the authentication service in the above handler. Is this possible?