check if key exists before reading it
check if key exists before reading it

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