Code Editor for app.py

import streamlit as st
import streamlit_authenticator as stauth
import yaml
from yaml.loader import SafeLoader
import os

# Initialize configuration file if it doesn't exist
if not os.path.exists('config.yaml'):
    config = {
        'credentials': {
            'usernames': {
                'jsmith': {
                    'email': 'jsmith@gmail.com',
                    'name': 'John Smith',
                    'password': stauth.Hasher(['abc123']).generate()[0]
                },
                'rbriggs': {
                    'email': 'rbriggs@gmail.com',
                    'name': 'Rebecca Briggs',
                    'password': stauth.Hasher(['def456']).generate()[0]
                }
            }
        },
        'cookie': {
            'expiry_days': 30,
            'key': 'some_signature_key',
            'name': 'some_cookie_name'
        }
    }
    with open('config.yaml', 'w') as file:
        yaml.dump(config, file, default_flow_style=False)

# Load configuration file
with open('config.yaml') as file:
    config = yaml.load(file, Loader=SafeLoader)

# Create an authentication object
authenticator = stauth.Authenticate(
    config['credentials'],
    config['cookie']['name'],
    config['cookie']['key'],
    config['cookie']['expiry_days']
)

# Add login widget
name, authentication_status, username = authenticator.login('Login', 'main')

# Handle authentication status
if authentication_status == False:
    st.error('Username/password is incorrect')
elif authentication_status == None:
    st.warning('Please enter your username and password')
elif authentication_status:
    # Show the main app content
    authenticator.logout('Logout', 'main')
    st.write(f'Welcome *{name}*')
    st.title('Some content')
    
    # Add a registration widget
    try:
        if authenticator.register_user('Register user', preauthorization=False):
            st.success('User registered successfully')
            with open('config.yaml', 'w') as file:
                yaml.dump(config, file, default_flow_style=False)
    except Exception as e:
        st.error(e)

    # Add a forgot password widget
    try:
        username_forgot_pw, email_forgot_password, random_password = authenticator.forgot_password('Forgot password')
        if username_forgot_pw:
            st.success('New password sent securely')
            with open('config.yaml', 'w') as file:
                yaml.dump(config, file, default_flow_style=False)
    except Exception as e:
        st.error(e)

    # Add a forgot username widget
    try:
        username_forgot_username, email_forgot_username = authenticator.forgot_username('Forgot username')
        if username_forgot_username:
            st.success('Username sent securely')
    except Exception as e:
        st.error(e)

    # Add a reset password widget
    if authentication_status:
        try:
            if authenticator.reset_password(username, 'Reset password'):
                st.success('Password modified successfully')
                with open('config.yaml', 'w') as file:
                    yaml.dump(config, file, default_flow_style=False)
        except Exception as e:
            st.error(e)

    # Add an update user details widget
    if authentication_status:
        try:
            if authenticator.update_user_details(username, 'Update user details'):
                st.success('Entries updated successfully')
                with open('config.yaml', 'w') as file:
                    yaml.dump(config, file, default_flow_style=False)
        except Exception as e:
            st.error(e)