-- TTHotel account credentials for OAuth (separate from developer app client_id/secret)
-- "Учетная запись" + "Пароль" from TTHotel → Settings → PMS Integration
ALTER TABLE hotel_ttlock_config
  ADD COLUMN IF NOT EXISTS ttlock_username TEXT,  -- "Учетная запись", e.g. h_1754382851163
  ADD COLUMN IF NOT EXISTS ttlock_password TEXT;  -- "Пароль" (stored as-is, md5'd before OAuth call)