public async Task <string> Coll(tblCollaborator objtbl)
        {
            //Tuple<List<tblLabel>, List<tblLabelNotes>, List<tblCollaborator>> result = null;
            var list = new List <tblCollaborator>();

            list = noteService.Coll(objtbl);
            string JSONString;

            JSONString = JsonConvert.SerializeObject(list);

            return(JSONString);
            //return "";
        }