private void btnRemoveUser_Click(object sender, EventArgs e)
        {
            if(lstUsers.SelectedIndices.Count == 0)
            {
                MessageBox.Show("You must select a user to delete.", "No user selected", MessageBoxButtons.OK, MessageBoxIcon.Error);
                return;
            }

            DialogResult result = MessageBox.Show("Are you sure that you would like to remove this user?", "Confirm - DROP USER"
                , MessageBoxButtons.YesNoCancel, MessageBoxIcon.Question);

            if (result == DialogResult.No || result == DialogResult.Cancel)
                return;

            BusinessObjects _businessObjects = new BusinessObjects();
            int returnValue = _businessObjects.DeleteUserAccount(lstUsers.SelectedItems[0].Text);

            if(returnValue == 0)
                MessageBox.Show("User deleted successfully.", "Result"
                    , MessageBoxButtons.OK, MessageBoxIcon.Information);

            RefreshUserList();
        }