Hello Streamlit community! 
I recently created a small PyPI package called streamlit-google-auth.
This package provides a simple and easy-to-use integration of Google authentication in your Streamlit application.
Getting Started
- Install the package:
pip install streamlit-google-auth - Create a Google Cloud Platform project and obtain the client ID and client secret. You can follow the instructions here to create the credentials.
- Save the client ID and client secret in a JSON file (e.g., google_credentials.json).
- 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',
)
- 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
authenticator.login()
# Display the user information and logout button if the user is authenticated
if not st.session_state['connected']:
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')
authenticator = Authenticate(
secret_credentials_path = 'google_credentials.json',
cookie_name='my_cookie_name',
cookie_key='this_is_secret',
redirect_uri = 'http://localhost:8501',
)
# Catch the login event
authenticator.check_authentification()
# Create the login button
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'):
authenticator.logout()
Check the Github for more infos and maybe leave a star 
: HERE
Or the PyPI page: PyPI link
