We use this for clients, so having to ask them for their passwords is annoying and tedious. We should be able to add any social feed by just using handles. Twitter already allows you to do this natively, your apps just have better customization than their native embed widget.
Thank you for sharing your idea!
We understand your reasons, however, unfortunately, not all APIs let you display feed by just handles. At the moment, only Twitter supports such an option while other platforms still don't.
Have a nice day!