Password example

app.py

import toga


class Login(toga.App):

    def validate_user(self, widget):
        if self.username.value == self.password.value:
            self.main_window.info_dialog("Login", "Welcome to the show!")
        else:
            self.main_window.error_dialog("Error", "Go away, intruder!")


    def startup(self):
        self.main_window = toga.MainWindow(self.name)
        self.main_window.app = self

        un_label = toga.Label("Username")
        self.username = toga.TextInput()
        pw_label = toga.Label("Password")
        self.password = toga.PasswordInput()
        button = toga.Button("Login", on_press=self.validate_user)

        box = toga.Box()
        un_box = toga.Box()
        pw_box = toga.Box()

        un_box.add(un_label)
        un_box.add(self.username)

        pw_box.add(pw_label)
        pw_box.add(self.password)
        pw_box.add(button)

        box.add(un_box)
        box.add(pw_box)

        self.username.style.set(width=100)
        un_label.style.set(width=100)

        self.password.style.set(width=100)
        pw_label.style.set(width=100)
        button.style.set(width=100)

        un_box.style.set(padding=5, flex_direction='row')
        pw_box.style.set(padding=5, flex_direction='row')
        box.style.set(padding=5, flex_direction='column')

        self.main_window.content = box
        self.main_window.show()


def main():
    return Login('Login', 'org.pybee.login')

This doesn't run for me with python -m login