Use self::prepare() instead of self::$connection->prepare.
Use self::prepare() instead of self::$connection->prepare.

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