updated db schema for attachments + add create user api endpoint

server/api/user_api.py

@@ -23,3 +23,43 @@ def get_user_forums() -> tuple[flask.Response, int]:
     forums_dict = {"forums" : [dataclasses.asdict(forum) for forum in forums]}
 
     return flask.jsonify(forums_dict), 200
+
+
+@user.route('/create', methods=['POST'])
+def create_user() -> tuple[flask.Response, int]:
+    """
+    Create a new user account.
+    Expects JSON with 'username' and 'password' fields.
+    """
+    data = flask.request.get_json()
+
+    if not data:
+        return flask.jsonify({"error": "No JSON data provided"}), 400
+
+    username = data.get('username')
+    password = data.get('password')
+
+    if not username or not password:
+        return flask.jsonify({"error": "Username and password are required"}), 400
+
+    # Validate username length and characters
+    if len(username.strip()) == 0:
+        return flask.jsonify({"error": "Username cannot be empty"}), 400
+
+    if len(password) < 6:
+        return flask.jsonify({"error": "Password must be at least 6 characters long"}), 400
+
+    # Attempt to create the user
+    new_user = database.create_user(username.strip(), password)
+
+    if new_user is None:
+        return flask.jsonify({"error": "Username already exists or creation failed"}), 409
+
+    # Return the created user (without sensitive data)
+    user_dict = {
+        "id": new_user.id,
+        "name": new_user.name,
+        "message": "User created successfully"
+    }
+
+    return flask.jsonify(user_dict), 201