chore: fix issue

node.py

@@ -139,7 +139,7 @@ class LibrarySystem:
         print(self.user)
         if self.user != None:
             st.session_state.app_state = "default"
-            st.session_state.user = self.user["name"]
+            st.session_state.user = self.user
             self.run_main_app()
         else:
             response = st.write_stream(response_generator("User not found"))
@@ -166,11 +166,12 @@ class LibrarySystem:
             self.database.createUser({"name": self.user, "id": user_id})
             st.session_state.app_state = "default" # we set to default here when registration is done
             self.user = self.database.searchUser(user_id)
+            st.session_state.user = self.user
             self.run_main_app()
 
 
     def run_main_app(self):
-      message = f"""Welcome {st.session_state.user.title()}! 😊\nPlease choose an option:
+      message = f"""Welcome {st.session_state.user["name"].title()}! 😊\nPlease choose an option:
                 1️⃣ Search Book  
                 2️⃣ Borrow Book  
                 3️⃣ Return Book