websockets rrto rdp-api trep refinitiv-realtime-optimised elektron-sdk refinitiv-realtime python authentication api elektron rics connection c# ADS mrn posting fields streaming-prices token forex node-js contributions r refresh error-login cloud pricing java market-by-order chain-ric conflation market-feed disconnection log-in licensing documentation .net historical javascript refinitiv-real-time-optimised batch data rkd-api credentials time-stamp news streaming-data post Service key delayed-feed domain error aws date support snapshot-pricing stream-id update-message web time-series qos DACS eikon quote isin sequence rfa eikon-data-api status error-message stream sso ts1 caching open-dacs derivatives angular perl rcc-api parser rdp json testing CONTEX c marketpsych economic-data messages response encryption port-number rcc error-502 entitlements stream-state synchronous news-text-analytics condition-codes eap permissioning api-limits trade ATS performance java-8 elektron-data-dictionary refinitiv-data-platform tick-data dss-rest-api rt-get level-2 OMM developer-community exchange-codes exception denied-by-src unix time document FID warrants ipa market-holidays error-400 futures page app-key oauth sample-code endpoint symbology record-matching-api symbol-list sink-driven-source refinitiv-data-platform-libraries url logging race-condition description batch-request typescript