rdp-api refinitiv-data-platform python elektron-sdk research ipa api esg refinitiv-data-platform-libraries token symbology websockets eikon-data-api forex authentication codebook historical fields search rics funds eikon volatility news error refinitiv-realtime data pricing lipper api-playground streaming-prices c# bonds derivatives subscription java .net documentation excel chain-ric rdp credentials oauth workspace pricing-history aws bulk-download error-403 certificate equities starmine rdp ipa api json rdp search rfa ssl swaps Download eikon-com-api refinitiv data platform json-payload beta machine-id price-history isin packages snapshot-pricing tutorial holiday web futures gics market-holidays corporate-actions postman csv date rrt zero-curve monitoring DACS refinitiv-dataplatform-eikon decoder error-login sql update-message port-number html trep error-message rest-api dss-rest-api ema-api research api etf request proxy ADH alerts level-2 error-404 elektron-data-dictionary market rfa-api error-500 screening bitcoin client-file-store example screener news-topic-code-list sfc post mifid trade repo ts1 callback permissioning datastream-api parameters app-key elektron refinitiv-dataplatform-libraries usage market-by-order edp jupyter-notebook rssl filter nda-raw c++ volatility-surface session qos tick-history-rest-api metadata javascript news-filter volume economic-data cloud scopes url workspace-data-api estimates