Custom AuthorizeAttribute to auth swagger

PermissionsAttribute.cs

 /// <summary>
    /// PermissionsAttribute class
    /// </summary>
    public class PermissionsAttribute : AuthorizeAttribute
    {
        /// <summary>
        /// Gets called on authorization
        /// </summary>
        /// <param name="actionContext"></param>
        public override void OnAuthorization(System.Web.Http.Controllers.HttpActionContext actionContext)
        {
            if (!IsAuthorized(actionContext))
            {
                if (actionContext.Request.Headers.Contains(Constants.SwaggerUserId))
                {
                    IEnumerable<string> keys = null;
                    actionContext.Request.Headers.TryGetValues(Constants.SwaggerUserId, out keys);             
                    ClaimsPrincipalWrapper.SetCurrentPrincipal(GetMockedClaimsPrincipal(((string[])keys)[0]));
                }
                else
                {
                    HandleUnauthorizedRequest(actionContext);
                }
            }
        }

        /// <summary>
        /// Check if the user is authorized
        /// </summary>
        /// <param name="actionContext"></param>
        /// <returns></returns>
        protected override bool IsAuthorized(System.Web.Http.Controllers.HttpActionContext actionContext)
        {
            return base.IsAuthorized(actionContext);
        }

        /// <summary>
        /// Handle unauthorized request
        /// </summary>
        /// <param name="actionContext"></param>
        protected override void HandleUnauthorizedRequest(System.Web.Http.Controllers.HttpActionContext actionContext)
        {
            string errorMessage = Constants.AccessDenied;
            ErrorModel<MessagesModel> errorDataModel = new ErrorModel<MessagesModel>();
            errorDataModel.Errors = new List<MessagesModel>();
            errorDataModel.Errors.Add(new MessagesModel()
            {
                Message = errorMessage
            });

            actionContext.Response = actionContext.Request.CreateResponse(HttpStatusCode.Unauthorized, errorDataModel);
        }

        private ClaimsPrincipal GetMockedClaimsPrincipal(string userId)
        {
            ClaimsPrincipal claimsPrincipal = new ClaimsPrincipal();

            IList<Claim> claimCollection = new List<Claim>
            {
                new Claim(ConfigurationInfo.ClaimsUri, userId),
                new Claim(ClaimTypes.GivenName, Constants.SwaggerUser)
            };

            ClaimsIdentity claimsIdentity = new ClaimsIdentity(claimCollection);
            claimsPrincipal.AddIdentity(claimsIdentity);
            return claimsPrincipal;
        }
    }