Gradio ChatInterface REST API

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Hello,

I have deployed a RAG Chatbot using Gradio ChatInterface. The Gradio API documentation suggests to use the Gradio Client to run the below:

from gradio_client import Client

client = Client("https://username-spacename.hf.space/")
result = client.predict(
		"Hello!!",	# str in 'parameter_0' Textbox component
		api_name="/chat"
)
print(result)

Instead I am trying to invoke it using REST API (below) but it fails. Any suggestions please?

URL: https://username-spacename.hf.space/run/predict
METHOD: POST
PAYLOAD: { "detail": [ "What is a Trigger?" ] }

Thanks.