My main user at IBKR has an individual brokerage account and a Roth IRA account. And I created a secondary user for my brokerage account to use TWS API to automate my trading strategy. Now that I want to apply the same algorithm to my Roth IRA account as well, is there a way to create a secondary user that is linked to both my accounts? I want to avoid opening two Gateweay instances. I also don't want to use my master user for API purpose as I often add some manual trading for those two accounts from day to day. I submitted a ticket but have never gotten a reply smh.