How do I create a view that displays the author information of the current node being viewed? I need to show a view in the sidebar that shows information about the current node's author (Username, picture, email). How do I go about doing this?
Create a view with selecting a type as user.
Add "User:Content authored" relationship. 
IN Contextual filters add nid and select the option of "provide
default value" and select content Id from URL.


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That's it :)