register: Fix using subdomains logic when subdomains is disabled.
register: Fix using subdomains logic when subdomains is disabled.

vikas-parashar/zulip,JPJPJPOPOP/zulip,andersk/zulip,zulip/zulip,punchagan/zulip,blaze225/zulip,Jianchun1/zulip,punchagan/zulip,blaze225/zulip,arpith/zulip,JPJPJPOPOP/zulip,Galexrt/zulip,sonali0901/zulip,cosmicAsymmetry/zulip,rht/zulip,vabs22/zulip,rht/zulip,mahim97/zulip,vikas-parashar/zulip,isht3/zulip,peguin40/zulip,kou/zulip,jrowan/zulip,hackerkid/zulip,TigorC/zulip,christi3k/zulip,reyha/zulip,brainwane/zulip,vabs22/zulip,rht/zulip,paxapy/zulip,ryanbackman/zulip,eeshangarg/zulip,niftynei/zulip,paxapy/zulip,kou/zulip,j831/zulip,dhcrzf/zulip,jphilipsen05/zulip,isht3/zulip,zacps/zulip,grave-w-grave/zulip,brainwane/zulip,blaze225/zulip,TigorC/zulip,jainayush975/zulip,mahim97/zulip,dawran6/zulip,samatdav/zulip,brockwhittaker/zulip,dattatreya303/zulip,TigorC/zulip,dhcrzf/zulip,timabbott/zulip,samatdav/zulip,zulip/zulip,amyliu345/zulip,reyha/zulip,tommyip/zulip,amyliu345/zulip,christi3k/zulip,zacps/zulip,synicalsyntax/zulip,vabs22/zulip,jrowan/zulip,amyliu345/zulip,dawran6/zulip,brainwane/zulip,vaidap/zulip,arpith/zulip,joyhchen/zulip,AZtheAsian/zulip,punchagan/zulip,zulip/zulip,eeshangarg/zulip,sharmaeklavya2/zulip,dhcrzf/zulip,SmartPeople/zulip,jainayush975/zulip,punchagan/zulip,calvinleenyc/zulip,synicalsyntax/zulip,souravbadami/zulip,jainayush975/zulip,SmartPeople/zulip,rht/zulip,dattatreya303/zulip,sonali0901/zulip,dhcrzf/zulip,dattatreya303/zulip,calvinleenyc/zulip,andersk/zulip,kou/zulip,andersk/zulip,isht3/zulip,vabs22/zulip,SmartPeople/zulip,samatdav/zulip,peguin40/zulip,brainwane/zulip,rht/zulip,verma-varsha/zulip,timabbott/zulip,cosmicAsymmetry/zulip,amanharitsh123/zulip,dattatreya303/zulip,jackrzhang/zulip,timabbott/zulip,mahim97/zulip,vikas-parashar/zulip,zacps/zulip,KingxBanana/zulip,Diptanshu8/zulip,vikas-parashar/zulip,jackrzhang/zulip,reyha/zulip,dawran6/zulip,samatdav/zulip,cosmicAsymmetry/zulip,Galexrt/zulip,brockwhittaker/zulip,KingxBanana/zulip,souravbadami/zulip,vaidap/zulip,timabbott/zulip,grave-w-grave/zulip,mahim97/zulip,eeshangarg/zulip,grave-w-grave/zulip,zacps/zulip,grave-w-grave/zulip,rishig/zulip,Juanvulcano/zulip,dattatreya303/zulip,arpith/zulip,jrowan/zulip,reyha/zulip,vabs22/zulip,rishig/zulip,ryanbackman/zulip,rht/zulip,ryanbackman/zulip,vikas-parashar/zulip,zulip/zulip,tommyip/zulip,Juanvulcano/zulip,isht3/zulip,amanharitsh123/zulip,blaze225/zulip,SmartPeople/zulip,vaidap/zulip,punchagan/zulip,sharmaeklavya2/zulip,christi3k/zulip,eeshangarg/zulip,TigorC/zulip,niftynei/zulip,jrowan/zulip,calvinleenyc/zulip,Diptanshu8/zulip,AZtheAsian/zulip,tommyip/zulip,kou/zulip,kou/zulip,susansls/zulip,Juanvulcano/zulip,tommyip/zulip,amanharitsh123/zulip,mahim97/zulip,zacps/zulip,reyha/zulip,KingxBanana/zulip,ryanbackman/zulip,aakash-cr7/zulip,Diptanshu8/zulip,souravbadami/zulip,Galexrt/zulip,rishig/zulip,shubhamdhama/zulip,PhilSk/zulip,showell/zulip,aakash-cr7/zulip,amyliu345/zulip,brockwhittaker/zulip,Jianchun1/zulip,Jianchun1/zulip,peguin40/zulip,showell/zulip,verma-varsha/zulip,vikas-parashar/zulip,sharmaeklavya2/zulip,rht/zulip,verma-varsha/zulip,vaidap/zulip,cosmicAsymmetry/zulip,sonali0901/zulip,Galexrt/zulip,shubhamdhama/zulip,hackerkid/zulip,punchagan/zulip,amanharitsh123/zulip,jrowan/zulip,susansls/zulip,paxapy/zulip,synicalsyntax/zulip,peguin40/zulip,kou/zulip,aakash-cr7/zulip,andersk/zulip,JPJPJPOPOP/zulip,SmartPeople/zulip,hackerkid/zulip,hackerkid/zulip,souravbadami/zulip,zulip/zulip,niftynei/zulip,sonali0901/zulip,souravbadami/zulip,PhilSk/zulip,brockwhittaker/zulip,isht3/zulip,showell/zulip,timabbott/zulip,timabbott/zulip,christi3k/zulip,amanharitsh123/zulip,jackrzhang/zulip,sharmaeklavya2/zulip,synicalsyntax/zulip,cosmicAsymmetry/zulip,showell/zulip,rishig/zulip,grave-w-grave/zulip,KingxBanana/zulip,Juanvulcano/zulip,tommyip/zulip,samatdav/zulip,dawran6/zulip,niftynei/zulip,arpith/zulip,timabbott/zulip,PhilSk/zulip,eeshangarg/zulip,brainwane/zulip,joyhchen/zulip,Galexrt/zulip,vabs22/zulip,jackrzhang/zulip,showell/zulip,amanharitsh123/zulip,hackerkid/zulip,AZtheAsian/zulip,AZtheAsian/zulip,dhcrzf/zulip,JPJPJPOPOP/zulip,joyhchen/zulip,niftynei/zulip,blaze225/zulip,kou/zulip,grave-w-grave/zulip,souravbadami/zulip,rishig/zulip,Diptanshu8/zulip,hackerkid/zulip,jackrzhang/zulip,Jianchun1/zulip,verma-varsha/zulip,niftynei/zulip,punchagan/zulip,showell/zulip,dhcrzf/zulip,synicalsyntax/zulip,peguin40/zulip,samatdav/zulip,brainwane/zulip,jphilipsen05/zulip,blaze225/zulip,ryanbackman/zulip,joyhchen/zulip,christi3k/zulip,brockwhittaker/zulip,zacps/zulip,j831/zulip,j831/zulip,vaidap/zulip,TigorC/zulip,Juanvulcano/zulip,shubhamdhama/zulip,dattatreya303/zulip,sharmaeklavya2/zulip,amyliu345/zulip,Galexrt/zulip,joyhchen/zulip,synicalsyntax/zulip,brainwane/zulip,Jianchun1/zulip,susansls/zulip,eeshangarg/zulip,synicalsyntax/zulip,cosmicAsymmetry/zulip,paxapy/zulip,dhcrzf/zulip,aakash-cr7/zulip,aakash-cr7/zulip,AZtheAsian/zulip,calvinleenyc/zulip,peguin40/zulip,AZtheAsian/zulip,jphilipsen05/zulip,eeshangarg/zulip,dawran6/zulip,TigorC/zulip,showell/zulip,j831/zulip,verma-varsha/zulip,zulip/zulip,brockwhittaker/zulip,tommyip/zulip,calvinleenyc/zulip,jphilipsen05/zulip,susansls/zulip,shubhamdhama/zulip,andersk/zulip,shubhamdhama/zulip,jackrzhang/zulip,JPJPJPOPOP/zulip,sonali0901/zulip,Diptanshu8/zulip,jainayush975/zulip,aakash-cr7/zulip,Galexrt/zulip,tommyip/zulip,arpith/zulip,ryanbackman/zulip,paxapy/zulip,PhilSk/zulip,christi3k/zulip,shubhamdhama/zulip,rishig/zulip,andersk/zulip,jrowan/zulip,dawran6/zulip,calvinleenyc/zulip,PhilSk/zulip,JPJPJPOPOP/zulip,zulip/zulip,sharmaeklavya2/zulip,Jianchun1/zulip,Juanvulcano/zulip,jackrzhang/zulip,jainayush975/zulip,jphilipsen05/zulip,amyliu345/zulip,andersk/zulip,arpith/zulip,rishig/zulip,KingxBanana/zulip,susansls/zulip,mahim97/zulip,j831/zulip,SmartPeople/zulip,susansls/zulip,joyhchen/zulip,sonali0901/zulip,verma-varsha/zulip,jainayush975/zulip,PhilSk/zulip,KingxBanana/zulip,jphilipsen05/zulip,reyha/zulip,hackerkid/zulip,Diptanshu8/zulip,j831/zulip,shubhamdhama/zulip,paxapy/zulip,vaidap/zulip,isht3/zulip