Update app.py

app.py

@@ -6,7 +6,6 @@
 ############################################################################################################
 
 import streamlit as st          # Web app framework
-import hmac                     # Secure password validation
 import pandas as pd             # Data handling
 import os                       # File operations
 import logging                  # Logging functionality
@@ -162,6 +161,21 @@ st.markdown("""
     </style>
 """, unsafe_allow_html=True)
 
+with st.sidebar:
+    st.header("Configuration")
+    
+    # API Key Input Field
+    api_key = st.text_input(
+        "OpenAI API Key",
+        type="password",
+        key="api_key",
+        help="This is the API key for your OpenAI account. You can find it [here](https://platform.openai.com/api-keys)."
+    )
+    if api_key:
+        st.session_state["OPENAI_API_KEY"] = api_key
+    else:
+        st.warning("Please provide your OpenAI API key to enable chat functionality.")
+
 ############################################################################################################
 # Initialize all session state variables - Persistent data between app reruns
 ############################################################################################################
@@ -184,47 +198,6 @@ if 'seen_terms' not in st.session_state:
 if 'openai_model' not in st.session_state:
     st.session_state.openai_model = config.ai_model  # AI model being used
 
-############################################################################################################
-# Password protection - User authentication functionality
-############################################################################################################
-
-def check_credentials():
-    """Verifies username and password against stored credentials.
-    
-    Returns:
-        bool: True if credentials are valid, False otherwise.
-    """
-    def credentials_entered():
-        """Callback for when credentials are entered by the user."""
-        if (
-            hmac.compare_digest(st.session_state["username"], st.secrets["username"]) and
-            hmac.compare_digest(st.session_state["password"], st.secrets["password"])
-        ):
-            st.session_state["credentials_correct"] = True
-            del st.session_state["username"]  # Remove for security
-            del st.session_state["password"]  # Remove for security
-        else:
-            st.session_state["credentials_correct"] = False
-
-    # Return True if already validated in this session
-    if st.session_state.get("credentials_correct", False):
-        return True
-
-    # Display login form
-    st.text_input("Username", on_change=credentials_entered, key="username")
-    st.text_input("Password", type="password", on_change=credentials_entered, key="password")
-    
-    # Log invalid login attempts for security monitoring
-    if "credentials_correct" in st.session_state:
-        logging.warning("Invalid login attempt")  
-    return False
-
-# Validate user credentials before proceeding
-if not check_credentials():
-    st.stop()  # Stop execution if authentication fails
-else:
-    logging.info("Successful login")  # Log successful logins
-
 ############################################################################################################
 # Loading Terms - Data loading and preparation functions
 ############################################################################################################
@@ -364,9 +337,14 @@ with right_col:
         # Generate and display AI response when triggered
         if st.session_state.get("trigger_llm", False):
             try:
-                # Initialize OpenAI client
-                client = OpenAI(api_key=st.secrets["OPENAI_API_KEY"])
-                
+                # Initialize OpenAI client from session state
+                api_key = st.session_state.get("OPENAI_API_KEY", "")
+                if api_key:
+                    client = OpenAI(api_key=api_key)
+                else:
+                    client = None
+                    st.error("🔒  Missing API key—please enter it in the sidebar above.")
+
                 # Generate system message with term context
                 system_message = config.term_prompt(
                     selected_term=st.session_state.selected_term,