private void btn_login_Click(object sender, EventArgs e)
        {
            int type = _loginBusiness.getUserType(this.username.Text, this.password.Text);

            if (type == -1)
            {
                //wrong credentials
                MessageBox.Show("Ai gresit, mai incearca!");
                return;
            }

            if (type == 1)
            {
                Form userForm = new MainUserForm();
                this.Hide();
                userForm.FormClosed += userForm_FormClosed;
                userForm.Show();
            }
            else
            {
                Form userForm = new MainUserForm();
                this.Hide();
                userForm.FormClosed += userForm_FormClosed;
                userForm.Show();
            }
        }
        private void btn_login_Click(object sender, EventArgs e)
        {
            int type = _loginBusiness.getUserType(this.username.Text, this.password.Text);

            if (type == -1)
            {
                //wrong credentials
                MessageBox.Show("Ai gresit, mai incearca!");
                return;
            }

            if (type == 1)
            {
                Form userForm = new MainUserForm();
                this.Hide();
                userForm.FormClosed += userForm_FormClosed;
                userForm.Show();
            }
            else
            {
                Form userForm = new MainUserForm();
                this.Hide();
                userForm.FormClosed += userForm_FormClosed;
                userForm.Show();
            }
        }