Looking to build a system that can trade signals across multiple IB accounts. I have used the TWS Gateway before but thought that perhaps there was a different way to connect to the API without the gateway. Is that true? What is the best approach to trading in multiple accounts? Do I need to have them link to my IB account login for access or can they provide credentials for me to use? I saw the SSO APi section for the client API but the docs are a bit confusing. A Any directional help is appreciated.