Sign in with Google.

pip install reflex-google-auth

Head over to https://console.developers.google.com/apis/credentials and sign in with the Google account that should manage the app and credential tokens.

• Click "Create Project" and give it a name. After creation the new project should be selected.
• Click "Configure Consent Screen", Choose "External", then Create.
  • Enter App Name and User Support Email -- these will be shown to users when logging in
  • Scroll all the way down to "Developer contact information" and add your email address, click "Save and Continue"
  • Click "Add or Remove Scopes"
    • Select "Email", "Profile", and "OpenID Connect"
    • Click "Update", then "Save and Continue"
  • Add any test users that should be able to log in during development.
• From the "Credentials" page, click "+ Create Credentials", then "OAuth client ID"
  • Select Application Type: "Web Application"
  • Add Authorized Javascript Origins: http:https://localhost, http:https://localhost:3000, https://example.com (prod domain must be HTTPS)
  • Click "Save"
• Copy the OAuth "Client ID" and save it for later. Mine looks like 309209880368-4uqd9e44h7t4alhhdqn48pvvr63cc5j5.apps.googleusercontent.com

The GoogleAuthState provided by this component has a token_is_valid var that should be checked before returning any protected content.

Additionally the GoogleAuthState.tokeninfo dict contains the user's profile information.

from reflex_google_auth import GoogleAuthState, require_google_login


class State(GoogleAuthState):
    @rx.cached_var
    def protected_content(self) -> str:
        if self.token_is_valid:
            return f"This content can only be viewed by a logged in User. Nice to see you {self.tokeninfo['name']}"
        return "Not logged in."

The convenience decorator, require_google_login, can wrap an existing component, and show the "Sign in with Google" button if the user is not already authenticated. It can be used on a page function or any subcomponent function of the page.

The "Sign in with Google" button can also be displayed via google_login():

from reflex_google_auth import google_login, google_oauth_provider

def page():
    return rx.div(
        google_oauth_provider(
            google_login(),
        ),
    )

To uniquely identify a user, the GoogleAuthState.tokeninfo['sub'] field can be used.

See the example in masenf/rx_shout for how to integrate an authenticated Google user with other app-specific user data.