def delete(element_key)
      parameter = { basic_auth: @auth }
      response = self.class.delete("/elements/#{element_key}", parameter)
      unless response.success?
        puts "Could not save element: #{response.headers['x-errordescription']}"
      end
      response
    end
def delete(element_key)
      parameter = { basic_auth: @auth }
      response = self.class.delete("/elements/#{element_key}", parameter)
      unless response.success?
        puts "Could not save element: #{response.headers['x-errordescription']}"
      end
      response
    end
Deletes an element with the key
 It returns the http response.