app.py

import gradio as gr
import os

hf_token= os.environ["HUGGINGFACEHUB_API_TOKEN"]
dev_space = os.environ["DEV_SPACE"]
demo = gr.load(dev_space, src="spaces", hf_token=hf_token)
demo.launch(auth=(os.getenv("USERNAME"), os.getenv("PASSWORD")))

# or 
# tmp_link = os.environ["REMOTE_GRADIO_LINK"]
# with gr.Blocks(css="""footer {visibility: hidden};""") as demo:
#    output = gr.HTML("""<iframe src="{}" style="width:100%; height:1024px; overflow:auto"></iframe>""".format(tmp_link))