Getting creator photo for Desk Community Topic

Getting creator photo for Desk Community Topic

I'm loading topics using `https://desk.zoho.com/api/v1/communityTopics` API call and trying to use photo URL from `topic.creator.photoUrl` field its value is:


But I can't access photo using that URL, it returns 
{"errorCode":"UNAUTHORIZED","message":"You are not authenticated to perform this operation."}

How I can access topic creator's photo?


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