public async Task <IResult> Handle(CreateUserGroupCommand request, CancellationToken cancellationToken)
{
var userGroup = new UserGroup
{
GroupId = request.GroupId,
UserId = request.UserId
};
_userGroupDal.Add(userGroup);
await _userGroupDal.SaveChangesAsync();
return(new SuccessResult(Messages.UserGroupAdded));
}