bulk_create: Refactor bulk_create_users to use more pythonic style.
bulk_create: Refactor bulk_create_users to use more pythonic style.

Note: This changes semantics slightly; you now can't call
bulk_create_users with a list of N users containing duplicates and
expect it to work.

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