Streamlit Google Auth

This package provides a simple and easy-to-use integration of Google authentication in your Streamlit application.

Getting Started

1. Install the package:
   pip install streamlit-google-auth

2. Create a Google Cloud Platform project and obtain the client ID and client secret. You can follow the instructions here to create the credentials.

3. Save the client ID and client secret in a JSON file (e.g., google_credentials.json).

4. Import the necessary modules and initialize the Authenticate class:

   import streamlit as st
   from streamlit_google_auth import Authenticate
   
   authenticator = Authenticate(
       secret_credentials_path='google_credentials.json',
       cookie_name='my_cookie_name',
       cookie_key='this_is_secret',
       redirect_uri='http://localhost:8501',
   )
   

5. Check if the user is already authenticated and handle the login/logout flow:

   # Check if the user is already authenticated
   authenticator.check_authentification()
   
   # Display the login button if the user is not authenticated
   if not st.session_state.get('connected', False):
       authorization_url = authenticator.get_authorization_url()
       st.markdown(f'[Login]({authorization_url})')
       st.link_button('Login', authorization_url)
   # Display the user information and logout button if the user is authenticated
   else:
       st.image(st.session_state['user_info'].get('picture'))
       st.write(f"Hello, {st.session_state['user_info'].get('name')}")
       st.write(f"Your email is {st.session_state['user_info'].get('email')}")
       if st.button('Log out'):
           authenticator.logout()
   

That's it! Your Streamlit app now has Google authentication integrated.

Configuration

The Authenticate class takes the following parameters:

• secret_credentials_path: The path to the Google Cloud Platform credentials JSON file.
• cookie_name: The name of the cookie used to store the authentication information.
• cookie_key: The secret key used to encrypt the cookie.
• redirect_uri: The redirect URI of your Streamlit application.
• cookie_expiry_days: Optional, The number of days the cookie stay valid.

Functions

The Authenticate class provides the following functions:

• check_authentification(): Catch the event when the user come back from the google login page and log it.
• login(): Displays the login button and handles the authentication flow.
• logout(): Logs out the user and clears the session state.
• get_authorization_url(): Returns the URL for the Google authentication page.

Session State

The Authenticate class updates the following keys in the Streamlit session state:

• connected: A boolean indicating whether the user is authenticated or not.
• oauth_id: The unique identifier for the authenticated user.
• user_info: A dictionary containing the user's name, email, and profile picture URL.

Example

Here's a complete example of how to use the Authenticate class in a Streamlit app:

import streamlit as st
from streamlit_google_auth import Authenticate

st.title('Streamlit Google Auth Example')

if 'connected' not in st.session_state:
    authenticator = Authenticate(
        secret_credentials_path = 'google_credentials.json',
        cookie_name='my_cookie_name',
        cookie_key='this_is_secret',
        redirect_uri = 'http://localhost:8501',
    )
    st.session_state["authenticator"] = authenticator

# Catch the login event
st.session_state["authenticator"].check_authentification()

# Create the login button
st.session_state["authenticator"].login()

if st.session_state['connected']:
    st.image(st.session_state['user_info'].get('picture'))
    st.write('Hello, '+ st.session_state['user_info'].get('name'))
    st.write('Your email is '+ st.session_state['user_info'].get('email'))
    if st.button('Log out'):
        st.session_state["authenticator"].logout()