private void btnLogin_Click(object sender, EventArgs e)
        {
            if (ValidationCheck())
            {
                APIKey = new Puush().Login(txtEmail.Text, txtPassword.Text);

                if (!string.IsNullOrEmpty(APIKey))
                {
                    DialogResult = DialogResult.OK;
                    Close();
                }
                else
                {
                    MessageBox.Show("Login failed.", "Authentication failure", MessageBoxButtons.OK, MessageBoxIcon.Error);
                }
            }
        }
        private void btnPuushLogin_Click(object sender, EventArgs e)
        {
            if (PuushValidationCheck())
            {
                txtPuushAPIKey.Text = "";

                string apiKey = new Puush().Login(txtPuushEmail.Text, txtPuushPassword.Text);

                if (!string.IsNullOrEmpty(apiKey))
                {
                    txtPuushAPIKey.Text = apiKey;
                }
                else
                {
                    MessageBox.Show("Login failed.", "Authentication failure", MessageBoxButtons.OK, MessageBoxIcon.Error);
                }
            }
        }
        private void btnPuushLogin_Click(object sender, EventArgs e)
        {
            bool result = true;

            if (string.IsNullOrEmpty(txtPuushEmail.Text))
            {
                txtPuushEmail.BackColor = Color.FromArgb(255, 200, 200);
                result = false;
            }

            if (string.IsNullOrEmpty(txtPuushPassword.Text))
            {
                txtPuushPassword.BackColor = Color.FromArgb(255, 200, 200);
                result = false;
            }

            if (result)
            {
                txtPuushAPIKey.Text = "";

                string apiKey = new Puush().Login(txtPuushEmail.Text, txtPuushPassword.Text);

                if (!string.IsNullOrEmpty(apiKey))
                {
                    txtPuushAPIKey.Text = apiKey;
                }
                else
                {
                    MessageBox.Show("Login failed.", "Authentication failure", MessageBoxButtons.OK, MessageBoxIcon.Error);
                }
            }
        }