got error of 404 while fetching ZOHO inventory data

got error of 404 while fetching ZOHO inventory data

I trying to fetch data from Zoho inventory, I got the access token and refresh token, but when I am trying to fetch inventory data I got the error 404 code with this response,"{
  "url": "https://inventory.zoho.in/api/v1/items?response_option=2",
  "status": 401,
  "statusText": "Unauthorized", etc....}"
with the same code I tried with my other zoho inventory account, I got the data properly, so please guide me 

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