public void DelFromWatchers(object nameadded)
        {
            JSONRequest jsonrequest = new JSONRequest
            {
                urlRequest    = $"/rest/api/2/issue/{this.issueKey}/watchers?username={(((RTMobile.User)nameadded).name)}",
                methodRequest = "DELETE"
            };
            Request requestIssue = new Request(jsonrequest);

            requestIssue.GetResponses <RootObject>();
            if (Additional.Count != 0)
            {
                Additional.Remove((RTMobile.User)nameadded);
                watchers.Remove(new Watchers {
                    name = ((RTMobile.User)nameadded).name, displayName = ((RTMobile.User)nameadded).displayName
                });
                OnPropertyChanged(nameof(Additional));
                OnPropertyChanged(nameof(watchers));
            }
        }