问如何在没有身份框架的情况下执行基于角色的授权？

EN

var claims = new Claim[]
            {
                new Claim(ClaimTypes.Name, "Jeffcky"),
                new Claim(ClaimTypes.Role,"Administrator")
            };
var key = new SymmetricSecurityKey(Encoding.UTF8.GetBytes("........"));

            var token = new JwtSecurityToken(
              issuer: "......",
              audience: "......",
              claims: claims,
              notBefore: DateTime.Now,
              expires: DateTime.Now.AddMinutes(5),
              signingCredentials: new SigningCredentials(key, SecurityAlgorithms.HmacSha256)
            );
var token=new JwtSecurityTokenHandler().WriteToken(token);