add suport to add users

dialog_add_user.h

@@ -0,0 +1,37 @@
+#ifndef DIALOG_ADD_USER_H
+#define DIALOG_ADD_USER_H
+
+#include <gtkmm/window.h>
+#include <gtkmm/dialog.h>
+#include <gtkmm/label.h>
+#include <gtkmm/entry.h>
+#include <gtkmm/checkbutton.h>
+
+#include "session_manager.h"
+
+class dialog_add_user : public Gtk::Dialog
+{
+public:
+  dialog_add_user(Gtk::Window *win, session_manager *sesion);
+private:
+  session_manager *sesion;
+
+  Gtk::Box box_user;
+  Gtk::Label user;
+  Gtk::Entry entry_user;
+
+  Gtk::Box box_pass;
+  Gtk::Label pass;
+  Gtk::Entry entry_pass;
+
+  Gtk::Box box_admin;
+  Gtk::Label l_admin;
+  Gtk::CheckButton c_admin;
+
+  Gtk::Button b_add;
+
+  void on_button_clicked();
+  void add_elements();
+};
+
+#endif // DIALOG_ADD_USER_H