hub/auth: groundwork for  disdinquishing between "public" and "private" SSOs. also a way to disable one of them, without deleting the actual data
hub/auth: groundwork for  disdinquishing between "public" and "private" SSOs. also a way to disable one of them, without deleting the actual data

sagemathinc/smc,sagemathinc/smc,tscholl2/smc,tscholl2/smc,sagemathinc/smc,tscholl2/smc,tscholl2/smc,sagemathinc/smc,tscholl2/smc