Update authenticate.php
Update authenticate.php

Fix 'Undefined index: wrongpw' error
pollopolea/core,michaelletzgus/nextcloud-server,cernbox/core,owncloud/core,andreas-p/nextcloud-server,michaelletzgus/nextcloud-server,lrytz/core,Ardinis/server,endsguy/server,pmattern/server,cernbox/core,owncloud/core,nextcloud/server,whitekiba/server,pixelipo/server,cernbox/core,pmattern/server,IljaN/core,lrytz/core,jbicha/server,lrytz/core,pmattern/server,michaelletzgus/nextcloud-server,sharidas/core,pixelipo/server,bluelml/core,bluelml/core,whitekiba/server,andreas-p/nextcloud-server,IljaN/core,andreas-p/nextcloud-server,sharidas/core,endsguy/server,xx621998xx/server,endsguy/server,pollopolea/core,bluelml/core,pollopolea/core,lrytz/core,sharidas/core,xx621998xx/server,Ardinis/server,sharidas/core,jbicha/server,whitekiba/server,jbicha/server,IljaN/core,IljaN/core,phil-davis/core,Ardinis/server,nextcloud/server,endsguy/server,pixelipo/server,sharidas/core,owncloud/core,pixelipo/server,owncloud/core,michaelletzgus/nextcloud-server,jbicha/server,pollopolea/core,andreas-p/nextcloud-server,bluelml/core,xx621998xx/server,Ardinis/server,nextcloud/server,IljaN/core,nextcloud/server,pmattern/server,pmattern/server,Ardinis/server,andreas-p/nextcloud-server,xx621998xx/server,endsguy/server,pixelipo/server,xx621998xx/server,jbicha/server,cernbox/core,owncloud/core,pollopolea/core,lrytz/core,whitekiba/server,whitekiba/server,bluelml/core,cernbox/core