change username from md to textbox to avoid UI freeze

app.py

@@ -6,7 +6,6 @@ from chart_generation import *
 from charts_advanced import *
 from users_management import *
 
-users = load_from_json()
 
 # Categories
 categories = [
@@ -89,7 +88,7 @@ with gr.Blocks() as demo:
         with gr.Column():
             gr.Markdown("## Extaction, Classification and AI tool")
         with gr.Column():
-            md_username = gr.Markdown()
+            md_username = gr.Textbox()
             btn_logout = gr.Button("Logout")
     with gr.Accordion(label="**Login** to keep user preferences", open=False):
         st_user = gr.State()