我试图使网络应用程序与。net核心6和React，但有一个问题，当我试图使用API这是授权的特定角色。
这是我的准则

public class SessionBasedAuthorizationHandler : AuthorizationHandler<SessionBasedAuthorizationRequirement>
    {
        private readonly IHttpContextAccessor _httpContextAccessor;
        public SessionBasedAuthorizationHandler(IHttpContextAccessor httpContextAccessor)
        {
            _httpContextAccessor = httpContextAccessor;
        }

        protected override Task HandleRequirementAsync(AuthorizationHandlerContext context, SessionBasedAuthorizationRequirement requirement)
        {
            string role = _httpContextAccessor.HttpContext.Session.GetString("Role");
            if (role is null)
            {
                context.Fail();
                return Task.CompletedTask;
            }

            if (role == requirement.Role.ToString())
            {
                context.Succeed(requirement);
                return Task.CompletedTask;
            }
            else
            {
                context.Fail();
                return Task.CompletedTask;
            }
        }
    }

当我尝试使用具有特定角色的东西时，它在这一行中给我一个例外：

string role = _httpContextAccessor.HttpContext.Session.GetString("Role");

例外情况：

System.InvalidOperationException: 'Session has not been configured for this application or request.'

你能给我一个修理的建议吗？