添加claim

var claims = new List<Claim>();
//claims.Add(new Claim(ClaimTypes.Name, model.UserName));
claims.Add(new Claim("userName", model.UserName));
claims.Add(new Claim("member", model.Member));

获取claim

IEnumerable<Claim> claims = HttpContext.GetOwinContext().Authentication.User.Claims;
string member = claims.ToList().Find(x => x.Type == "member").Value.ToString();