import eikon as ek
ek.set_app_key('***')
eod_cols = [
'CTBTR_1',
'HST_CLOSE2',
]
ric = 'USOIRU=ECI'
res, err = ek.get_data([ric], eod_cols, {'SDate': '2024-05-01', 'EDate': '2024-06-30'})
How to get the historical data of "HST_CLOSE2" or "CTBTR_1" using the above code?