private void Users_List_Button_Click(object sender, System.EventArgs e)
{
// Display data from server
Display_DataGridView.DataSource = Database.Load_Users_List();
// Reset buttons colors
Set_Button_Color(0);
pointer = 4;
// Change color on the button
Set_Button_Color(pointer);
// Set buttons as availabe
Change_Button_Access(pointer);
}