With C# we have tried to use http requests with the information in the documentation, with both user authenticacion and the aplicatiton-only one(which lead to only 401, 403, 404 messages), tweetinvi (which could authenticate as a user; but failed to retrieve data in a simple query with a point_radius filter), twitter2LINQ (no capabilites on our requirements) and Twitterizer (that correctly authenticated but presented an error about no permissions on the requested resource).
On the other hand, with Python we tried using searchtweets library but couldn’t find how to properly use the filters, as we want to input coordinates and radius as the documentation mentions as posible. No place in the docs in github to find that information.
It seems as if no way to use the premium API (sandbox one) including a point_radius exists, is that the case? If so, what would be a workaround this issue? Thanks in advance for your help.