def create_regwindow(self):
      t = tk.Toplevel(self)
      t.wm_title("Register")
      t.field_user = tk.Label(self, text="Username")
      t.field_pass = tk.Label(self, text="Password")

      t.entry_user = tk.Entry(self)
      t.entry_pass = tk.Entry(self, show="*")

      t.field_user.grid(row=0, sticky=tk.E)
      t.field_pass.grid(row=1, sticky=tk.E)
      t.entry_user.grid(row=0, column=1)
      t.entry_pass.grid(row=1, column=1)