Return a string from SessionUser:getUserIdentifier
Return a string from SessionUser:getUserIdentifier

This method is supposed to return a string and will in future symfony
versions. We use the ID as the identifier, but it should still be case
correctly.

dartajax/ilios,thecoolestguy/ilios,thecoolestguy/ilios,ilios/ilios,dartajax/ilios,Trott/ilios,Trott/ilios,stopfstedt/ilios,stopfstedt/ilios,ilios/ilios