private async Task <bool> CheckIfUserExist(MyUserAspNet userSecurity)
        {
            ApplicationUser user = new ApplicationUser {
                UserName = userSecurity.UserName
            };

            return((await userManager.FindByNameAsync(userSecurity.UserName) == null) ? false : true);
        }
        private async Task <string> AddUserToAspNetUsers(MyUserAspNet userSecurity, User userInfo, string role)
        {
            ApplicationUser user = new ApplicationUser {
                UserName = userSecurity.UserName, User = userInfo
            };
            var check = await userManager.CreateAsync(user, userSecurity.Password);

            if (check.Succeeded)
            {
                await userManager.AddToRoleAsync(user, role);

                return(user.Id);
            }
            return(null);
        }