I used a start_date of 2000-01-01 and the eikon.get_timeseries method for symbol Esc1 only yielded 50k candles dating back to May of this year. Is this a feature of my free trial of is this all of the data that is availabl?. Ideally, I would like minute candles dating back decades so that I can build mathematical models using the historical minute-by-minute data.