docs: Update task board and align development plan

DEVELOPMENT_PLAN.md

@@ -9,9 +9,10 @@ The goal is to create a service where streamers can log in using their platform
 ## 2. Technology Stack
 
 *   **Team Communications:** Discord and Nextcloud, primarily. This can change. There's a list of links in the [README.md](README.md)
-*   **Backend (API & Chat Listeners):** Python (for Twitch/YouTube chat listeners), Node.js (for WebSocket server and potentially other APIs), PHP (for user management and web serving).
-*   **Database:** MySQL
-*   **Frontend:** HTML, CSS, JavaScript
+*   **Backend:** Python 3.9+ (FastAPI)
+*   **Database:** SQLite (for initial development) with SQLAlchemy ORM
+*   **Frontend:** Vanilla HTML, CSS, and JavaScript
+*   **Chat Listeners:** `twitchio` (Twitch), `pytchat` (YouTube)
 
 ## 3. Implementation Roadmap
 

auth.py

@@ -79,13 +79,27 @@ async def auth_twitch_callback(code: str, state: str, request: Request, db: Sess
         user_response = await client.get(users_url, headers=headers)
         user_data = user_response.json()["data"][0]
 
-    # TODO: Upsert user into our database
-    # For now, we'll just return the user data as a proof of concept.
-    
     # Encrypt the tokens for storage
     encrypted_tokens = security.encrypt_tokens(access_token, refresh_token)
 
-    # Here you would create or update the user in your database
-    # user = db.query(models.User).filter_by(platform_user_id=user_data['id']).first() ... etc.
+    # --- Database Upsert Logic ---
+    # Check if the user already exists in our database
+    user = db.query(models.User).filter(models.User.platform_user_id == user_data['id']).first()
 
-    return {"message": "Twitch login successful!", "user": user_data, "encrypted_tokens": encrypted_tokens}
+    if user:
+        # If user exists, update their details
+        user.username = user_data['login']
+        user.encrypted_tokens = encrypted_tokens
+    else:
+        # If user does not exist, create a new record
+        user = models.User(
+            platform_user_id=user_data['id'],
+            username=user_data['login'],
+            platform="twitch",
+            encrypted_tokens=encrypted_tokens
+        )
+        db.add(user)
+    
+    db.commit()
+
+    return {"message": f"Successfully authenticated as {user_data['display_name']}. User data has been saved."}