My query (using python interface) timed out, so I tried specifying async=True. It then returned with "Error in query(). Try checking that you are logged in." Do I need to be logged in as something other than anonymous? I then tried to create an account, following instructions in one of your Jupyter notebooks. I apparently successfully created a user (jrbogart), but logged out or got logged out somehow and the password I thought I used is not recognized.
The query was "select distinct (ring256 / 64) as ring32 from lsst_sim.simdr2". I tried several variants: with and without "distinct", submitted with sql= or with adql= and so forth.