Calling the RecommendedFor many times ended with no result

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Because I tried calling the RecommendedFor function to look for derived Keword queries, after several attempts (the first 1000x successful attempts to use for), but in the end it ended with no results.

Problem: At first I thought I was banned by IP.
Solution: So from that I moved the code to a different server, and got it back.

So the solution in my opinion is that we have to use a different IP, using a proxy to call the RecommendedFor function to look for many keywords.

Then, how do you call the recommendedFor implementation function but with a proxy and also login (because this function works when we are logged in)?

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Any one can help to do to this?