Re implement ShareUser as an extension for User rather than a replacement
Re implement ShareUser as an extension for User rather than a replacement

aaxelb/SHARE,aaxelb/SHARE,zamattiac/SHARE,zamattiac/SHARE,CenterForOpenScience/SHARE,laurenbarker/SHARE,zamattiac/SHARE,aaxelb/SHARE,CenterForOpenScience/SHARE,laurenbarker/SHARE,laurenbarker/SHARE,CenterForOpenScience/SHARE