AppHarbor.Web.Security.CookieAuthenticator.SetCookie C# (CSharp) Method

		public void SetCookie(string username, bool persistent = false, string[] roles = null, byte[] tag = null, DateTime? explicitExpiry = null)
		{
			var cookie = new AuthenticationCookie(0, Guid.NewGuid(), persistent, username, roles, tag);
			using (var protector = new CookieProtector(_configuration))
			{
				var httpCookie = new HttpCookie(_configuration.CookieName, protector.Protect(cookie.Serialize()))
				{
					HttpOnly = true,
					Secure = _configuration.RequireSSL,
				};

                if (!string.IsNullOrEmpty(_configuration.Domain))
                {
                    httpCookie.Domain = _configuration.Domain;
                }
			    if (persistent)
				{
				    DateTime expireDateTime;
				    if (explicitExpiry.HasValue)
				    {
                        expireDateTime = explicitExpiry.Value;
				    }
				    else
				    {
                        expireDateTime = cookie.IssueDate + _configuration.Timeout;
				    }
				    httpCookie.Expires = expireDateTime;
                    SetExpireTimeTrackingCookie(expireDateTime);
				}

				_context.Response.Cookies.Add(httpCookie);
			}
		}

 private void AuthUser(UserModel user)
 {
     IAuthenticator authenticator = new CookieAuthenticator();
     authenticator.SetCookie(user.UserName, true);
 }