Allow a user to be assigned to multiple groups
Allow a user to be assigned to multiple groups

stell/grav,joeyhenricks/a-broke-vegan,sylvestrelucia/grav,notklaatu/grav,joeyhenricks/a-broke-vegan,Pumpapa/lucaswalters.nl,Pumpapa/lucaswalters.nl,userfrosting/learn,JamesPan/gravbox,tcsizmadia/grav,JamesPan/gravbox,sylvestrelucia/grav,dimayakovlev/grav,dimayakovlev/grav,ccardinaux/grav-test,Pumpapa/lucaswalters.nl,Sommerregen/grav,userfrosting/learn,sylvestrelucia/grav,gigago/grav,notklaatu/grav,toovy/grav,lennerd/grav,Vivalldi/grav,getgrav/grav,Pumpapa/jacinthawalters.nl,tomzx/blog.tomrochette.com,webuxr/iamrs,JamesPan/gravbox,tomzx/blog.tomrochette.com,shortsofia/testesitegrav.github.io,userfrosting/learn,undesign/undesign.github.io,toovy/grav,tomzx/blog.tomrochette.com,sylvestrelucia/grav,userfrosting/learn,undesign/undesign.github.io,JamesPan/gravbox,getgrav/grav,Silwereth/grav,Vivalldi/grav,Pumpapa/chriswalters.nl,tomzx/blog.tomrochette.com