Adjusted the check user function to lowercase the return.
Adjusted the check user function to lowercase the return.

Signed-off-by: Insanemal <089734c7a163d69abcdfd9d310152f8896eb101c@gmail.com>

michaelletzgus/nextcloud-server,endsguy/server,andreas-p/nextcloud-server,Ardinis/server,michaelletzgus/nextcloud-server,owncloud/core,Ardinis/server,whitekiba/server,xx621998xx/server,sharidas/core,andreas-p/nextcloud-server,pollopolea/core,sharidas/core,cernbox/core,pollopolea/core,whitekiba/server,sharidas/core,owncloud/core,xx621998xx/server,pollopolea/core,IljaN/core,Ardinis/server,whitekiba/server,bluelml/core,jbicha/server,cernbox/core,cernbox/core,IljaN/core,owncloud/core,pixelipo/server,pixelipo/server,endsguy/server,lrytz/core,michaelletzgus/nextcloud-server,pmattern/server,cernbox/core,pixelipo/server,owncloud/core,xx621998xx/server,pixelipo/server,pmattern/server,bluelml/core,jbicha/server,IljaN/core,lrytz/core,lrytz/core,endsguy/server,nextcloud/server,xx621998xx/server,nextcloud/server,IljaN/core,pmattern/server,owncloud/core,nextcloud/server,whitekiba/server,whitekiba/server,endsguy/server,andreas-p/nextcloud-server,jbicha/server,cernbox/core,Ardinis/server,IljaN/core,andreas-p/nextcloud-server,pmattern/server,pollopolea/core,sharidas/core,pmattern/server,lrytz/core,pollopolea/core,nextcloud/server,lrytz/core,phil-davis/core,jbicha/server,bluelml/core,jbicha/server,bluelml/core,Ardinis/server,pixelipo/server,xx621998xx/server,andreas-p/nextcloud-server,michaelletzgus/nextcloud-server,sharidas/core,bluelml/core,endsguy/server