private async void LoadUserSkills()
        {
            SkillManager skillManager = (SkillManager)dataService.GetSkillManager();
            Dictionary <string, object> skillChargeParams = new Dictionary <string, object>();

            skillChargeParams.Add("mail", AppStaticInfo.Account.Mail);
            Skills = new ObservableCollection <Skill>((await skillManager.Charge(skillChargeParams)).Cast <Skill>().ToList());
        }