res = @@conn.post do |req|
      req.url "/_db/#{@@config.database_name}/_api/cursor"
      req.headers['Content-Type'] = 'application/json'
      req.headers['Authorization'] = "Basic #{Base64.encode64("#{@@config.username}:#{@@config.password}")}"
      req.body = { query: aql, bindVars: bindvars }.to_json