def userhref(uri, username)
      response = rest_get(uri)
      items = response_handler(response)['Items']
      items.each do |it|
        return it['links']['self']['href'] if it['UserName'] == username
      end
    end
def userhref(uri, username)
      response = rest_get(uri)
      items = response_handler(response)['Items']
      items.each do |it|
        return it['links']['self']['href'] if it['UserName'] == username
      end
    end
Get the HREF for a user with a specific username
 @param [String, Symbol] uri
 @param [String, Symbol] username
 @raise [RuntimeError] if the request failed
 @return [String] userhref