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

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