how to add session time in kivymd

[Hamza]

i want to define session time in kivymd please help me this the code

from kivy.lang import Builder

from kivymd.app import MDApp

from kivy.uix.screenmanager import ScreenManager, Screen

import json

from kivymd.uix.button import MDFlatButton

from kivymd.uix.dialog import MDDialog

import requests
help_str = '''
ScreenManager:
    WelcomeScreen:
    MainScreen:
    LoginScreen:
    SignupScreen:

<WelcomeScreen>:
    name:'welcomescreen'
    MDLabel:
        text:'Login'
        font_style:'H2'
        halign:'center'
        pos_hint: {'center_y':0.9}
    MDLabel:
        text:'&'

        font_style:'H2'
        halign:'center'
        pos_hint: {'center_y':0.7}
    MDLabel:
        text:'Signup'
        font_style:'H2'
        halign:'center'
        pos_hint: {'center_y':0.5}

    MDRaisedButton:
        text:'Login'
        pos_hint : {'center_x':0.4,'center_y':0.3}
        size_hint: (0.13,0.1)
        on_press:
            root.manager.current = 'loginscreen'
            root.manager.transition.direction = 'left'
    MDRaisedButton:
        text:'Signup'
        pos_hint : {'center_x':0.6,'center_y':0.3}
        size_hint: (0.13,0.1)
        on_press:
            root.manager.current = 'signupscreen'
            root.manager.transition.direction = 'left'

<LoginScreen>:
    name:'loginscreen'
    MDLabel:
        text:'Login'
        font_style:'H2'
        halign:'center'
        pos_hint: {'center_y':0.9}

    MDTextField:

        id:login_email
        pos_hint: {'center_y':0.6,'center_x':0.5}
        size_hint : (0.7,0.1)
        hint_text: 'Email'
        helper_text:'Required'
        helper_text_mode:  'on_error'
        icon_right: 'account'
        icon_right_color: app.theme_cls.primary_color
        required: True
        mode: "rectangle"
    MDTextField:
        id:login_password
        pos_hint: {'center_y':0.4,'center_x':0.5}
        size_hint : (0.7,0.1)
        hint_text: 'Password'
        helper_text:'Required'
        helper_text_mode:  'on_error'
        icon_right: 'account'
        icon_right_color: app.theme_cls.primary_color
        required: True
        mode: "rectangle"

    MDRaisedButton:
        text:'Login'
        size_hint: (0.13,0.07)
        pos_hint: {'center_x':0.5,'center_y':0.2}
        on_press:
            app.login()
            app.username_changer()



    MDTextButton:
        text: 'Create an account'
        pos_hint: {'center_x':0.5,'center_y':0.1}
        on_press:
            root.manager.current = 'signupscreen'
            root.manager.transition.direction = 'up'


<SignupScreen>:
    name:'signupscreen'
    MDLabel:
        text:'Signup'
        font_style:'H2'
        halign:'center'
        pos_hint: {'center_y':0.9}

    MDTextField:
        id:signup_email
        pos_hint: {'center_y':0.6,'center_x':0.5}
        size_hint : (0.7,0.1)
        hint_text: 'Email'
        helper_text:'Required'
        helper_text_mode:  'on_error'
        icon_right: 'account'
        icon_right_color: app.theme_cls.primary_color
        required: True
        mode: "rectangle"
    MDTextField:
        id:signup_username
        pos_hint: {'center_y':0.75,'center_x':0.5}
        size_hint : (0.7,0.1)
        hint_text: 'Username'
        helper_text:'Required'
        helper_text_mode:  'on_error'
        icon_right: 'account'
        icon_right_color: app.theme_cls.primary_color
        required: True
    MDTextField:
        id:signup_password
        pos_hint: {'center_y':0.4,'center_x':0.5}
        size_hint : (0.7,0.1)
        hint_text: 'Password'
        helper_text:'Required'
        helper_text_mode:  'on_error'
        icon_right: 'account'
        icon_right_color: app.theme_cls.primary_color
        required: True
        mode: "rectangle"
    MDRaisedButton:
        text:'Signup'
        size_hint: (0.13,0.07)
        pos_hint: {'center_x':0.5,'center_y':0.2}
        on_press: app.signup()

    MDTextButton:
        text: 'Already have an account'
        pos_hint: {'center_x':0.5,'center_y':0.1}
        on_press:
            root.manager.current = 'loginscreen'
            root.manager.transition.direction = 'down'




<MainScreen>:
    name: 'mainscreen'
    MDLabel:
        id:username_info
        text:'Hello Main'
        font_style:'H1'
        halign:'center'

'''

class WelcomeScreen(Screen):

    pass
class MainScreen(Screen):

    pass
class LoginScreen(Screen):

    pass
class SignupScreen(Screen):

    pass

sm = ScreenManager()

sm.add_widget(WelcomeScreen(name = 'loginscreen'))

sm.add_widget(MainScreen(name = 'mainscreen'))

sm.add_widget(LoginScreen(name = 'loginscreen'))

sm.add_widget(SignupScreen(name = 'signupscreen'))

class LoginApp(MDApp):

    def build(self):

        self.strng = Builder.load_string(help_str)

        self.url  = "https://signup-page-b2d84-default-rtdb.firebaseio.com/.json"

        return self.strng

    def signup(self):

        signupEmail = self.strng.get_screen('signupscreen').ids.signup_email.text

        signupPassword = self.strng.get_screen('signupscreen').ids.signup_password.text

        signupUsername = self.strng.get_screen('signupscreen').ids.signup_username.text

        if signupEmail.split() == [] or signupPassword.split() == [] or signupUsername.split() == []:

            cancel_btn_username_dialogue = MDFlatButton(text = 'Retry',on_release = self.close_username_dialog)

            self.dialog = MDDialog(title = 'Invalid Input',text = 'Please Enter a valid Input',size_hint = (0.7,0.2),buttons = [cancel_btn_username_dialogue])

            self.dialog.open()

        if len(signupUsername.split())>1:

            cancel_btn_username_dialogue = MDFlatButton(text = 'Retry',on_release = self.close_username_dialog)

            self.dialog = MDDialog(title = 'Invalid Username',text = 'Please enter username without space',size_hint = (0.7,0.2),buttons = [cancel_btn_username_dialogue])

            self.dialog.open()

        else:

            print(signupEmail,signupPassword)

            signup_info = str({f'\"{signupEmail}\":{{"Password":\"{signupPassword}\","Username":\"{signupUsername}\"}}'})

            signup_info = signup_info.replace(".","-")

            signup_info = signup_info.replace("\'","")

            to_database = json.loads(signup_info)

            print((to_database))

            requests.patch(url = self.url,json = to_database)

            self.strng.get_screen('loginscreen').manager.current = 'loginscreen'

    auth = 'NgEIf22B8fslemtfvs8DsOuB4aOinDVqIgEJHv8t'

    def login(self):

        loginEmail = self.strng.get_screen('loginscreen').ids.login_email.text

        loginPassword = self.strng.get_screen('loginscreen').ids.login_password.text

        self.login_check = False

        supported_loginEmail = loginEmail.replace('.','-')

        supported_loginPassword = loginPassword.replace('.','-')

        request  = requests.get(self.url+'?auth='+self.auth)

        data = request.json()

        emails= set()

        for key,value in data.items():

            emails.add(key)

        if supported_loginEmail in emails and supported_loginPassword == data[supported_loginEmail]['Password']:

            self.username = data[supported_loginEmail]['Username']

            self.login_check=True

            self.strng.get_screen('mainscreen').manager.current = 'mainscreen'

        else:

            print("user no longer exists")

    def close_username_dialog(self,obj):

        self.dialog.dismiss()

    def username_changer(self):

        if self.login_check:

            self.strng.get_screen('mainscreen').ids.username_info.text = f"welcome {self.username}"

LoginApp().run()

[Robert]

Whatever you are doing to share code is unreadable. Attach code in a .txt file.

For timeouts use the Kivy Clock. This is independent of KivyMD.

https://kivy.org/doc/stable/api-kivy.clock.html

Here is some code that schedules re-authorization (every 3550 seconds) using the Firestore refresh token.
https://github.com/Android-for-Python/cloud_storage_examples/blob/main/rest_firestore_example/main.py#L305-L325
You probably can't just copy that fragment, but if you read the code you will get the idea.