SignupWorker: Use dictionary indexing instead of get for name and email.
SignupWorker: Use dictionary indexing instead of get for name and email.

We always pass in EMAIL in data, and NAME in merge_vars.

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