How would I login without using a provider?

[nascin]

How would I login without using a provider (github), using a database for example?

[FeodorFitsner]

As mentioned here: https://flet.dev/docs/guides/python/authentication

Built-in Flet login with credentials and user management is planned for future releases. If you have a requirement to create and manage user accounts in your app you can implement it by your own or use Auth0 identity provider which provides a generous free tier.

I'm pretty sure a simple solution using SQLite and some ORM can be easily hacked over weekend :)

[nascin]

If I were to implement it, where should I start?

I have user data in firestore and access with a python API. In the case I wanted to receive the email of the user flet and compare with the email saved in the firestore, if it is the same, I would use the email with id to login.

[langfingaz]

Here is a short example where the user has to be logged in to reveal the secret.
You can change the part where the password is compared to the content of a file (on the server) with a database query or with some API requests to e.g. Firestore.

from pathlib import Path

import flet
from flet import Page, TextField, Text, ElevatedButton


class MyApp:
    @staticmethod
    def static_run(page: Page) -> None:
        MyApp(page)

    def __init__(self, page: Page):
        self.page: Page = page

        self.text_field_pwd = TextField(label="Enter password", password=True, can_reveal_password=True)
        self.elevated_button_login = ElevatedButton("Login", on_click=self.login)
        self.elevated_button_reveal = ElevatedButton("Reveal secret", on_click=self.reveal)
        self.text_secret = Text(value="Secret: ")

        self.logged_in = False

        page.add(
            self.text_field_pwd,
            self.elevated_button_login,
            self.elevated_button_reveal,
            self.text_secret,
        )

    def login(self, _e):
        if self.logged_in:
            self.elevated_button_login.text = "Login"
            self.text_secret.value = "Secret: "
            self.logged_in = False
        else:
            if self.text_field_pwd.value == Path('assets/pwd.txt').read_text().strip():
                self.elevated_button_login.text = "Logout"
                self.text_field_pwd.value = None
                self.text_field_pwd.error_text = None
                self.logged_in = True
            else:
                self.text_field_pwd.error_text = "Incorrect password!"

        self.page.update()

    def reveal(self, _e):
        if self.logged_in:
            self.text_secret.value = "Secret: " + Path('assets/secret.txt').read_text().strip()
            self.text_field_pwd.error_text = None
        else:
            self.text_field_pwd.error_text = "Please login first!"
        self.page.update()


if __name__ == '__main__':
    # To keep the example simple, we are reading the password and secret from files on the server.
    # Usually one would read them from a DB.
    Path("assets").mkdir(exist_ok=True)
    Path("assets/pwd.txt").write_text("password")
    Path("assets/secret.txt").write_text("This is a secret string.")

    # flet.app(target=MyApp.static_run, assets_dir="assets")
    flet.app(target=MyApp.static_run, assets_dir="assets", view=flet.WEB_BROWSER, port=8080)