public virtual OutgoingWebResponse VerifyAccess(HttpRequestBase httpRequestInfo, out AccessToken accessToken) {
			Requires.NotNull(httpRequestInfo, "httpRequestInfo");

			AccessProtectedResourceRequest request = null;
			try {
				if (this.Channel.TryReadFromRequest<AccessProtectedResourceRequest>(httpRequestInfo, out request)) {
					accessToken = this.AccessTokenAnalyzer.DeserializeAccessToken(request, request.AccessToken);
					ErrorUtilities.VerifyHost(accessToken != null, "IAccessTokenAnalyzer.DeserializeAccessToken returned a null reslut.");
					if (string.IsNullOrEmpty(accessToken.User) && string.IsNullOrEmpty(accessToken.ClientIdentifier)) {
						Logger.OAuth.Error("Access token rejected because both the username and client id properties were null or empty.");
						ErrorUtilities.ThrowProtocol(OAuth2Strings.InvalidAccessToken);
					}

					return null;
				} else {
					var response = new UnauthorizedResponse(new ProtocolException(OAuth2Strings.MissingAccessToken));

					accessToken = null;
					return this.Channel.PrepareResponse(response);
				}
			} catch (ProtocolException ex) {
				var response = request != null ? new UnauthorizedResponse(request, ex) : new UnauthorizedResponse(ex);

				accessToken = null;
				return this.Channel.PrepareResponse(response);
			}
		}
		public OutgoingWebResponse VerifyAccess(out AccessToken accessToken) {
			return this.VerifyAccess(this.Channel.GetRequestFromContext(), out accessToken);
		}
		/// <summary>
		/// Initializes a new instance of the <see cref="AccessTokenResult"/> class.
		/// </summary>
		/// <param name="accessToken">The access token to include in this result.</param>
		public AccessTokenResult(AccessToken accessToken) {
			Requires.NotNull(accessToken, "accessToken");
			this.AllowRefreshToken = true;
			this.AccessToken = accessToken;
		}