Apart from the stock Facebook external authentication, we alos offer Steam Login and Twitter Authentication. However, when checking the xf_user_external_auth table, only a single external authentication method can be used, as the one line that exists for a user will simply be overwritten in case the user then uses another authentication method. Could this be changed to support multiple lines? I am aware this can prolly be achieved by a hack of the core XF files, but would prefer it to be supported by XenForo itself so I do not have to hack my way around the system code. Cheers.