app.py

import gradio as gr

with gr.Blocks() as demo:
    gr.Markdown(f"# Greetings!")
    inp = gr.Textbox()
    out = gr.Textbox()

    inp.change(fn=lambda x: x, inputs=inp, outputs=out)

if __name__ == "__main__":
    demo.launch(auth=("admin", "admin"), ssr_mode=False)