hipchat import: Handle missing emails for guest users.
hipchat import: Handle missing emails for guest users.

synicalsyntax/zulip,brainwane/zulip,timabbott/zulip,andersk/zulip,timabbott/zulip,rishig/zulip,brainwane/zulip,brainwane/zulip,eeshangarg/zulip,synicalsyntax/zulip,punchagan/zulip,showell/zulip,shubhamdhama/zulip,eeshangarg/zulip,zulip/zulip,andersk/zulip,timabbott/zulip,rht/zulip,andersk/zulip,jackrzhang/zulip,brainwane/zulip,eeshangarg/zulip,andersk/zulip,shubhamdhama/zulip,synicalsyntax/zulip,brainwane/zulip,hackerkid/zulip,shubhamdhama/zulip,shubhamdhama/zulip,timabbott/zulip,tommyip/zulip,tommyip/zulip,rishig/zulip,rht/zulip,synicalsyntax/zulip,dhcrzf/zulip,rishig/zulip,rht/zulip,rht/zulip,showell/zulip,shubhamdhama/zulip,jackrzhang/zulip,kou/zulip,dhcrzf/zulip,timabbott/zulip,punchagan/zulip,shubhamdhama/zulip,rishig/zulip,synicalsyntax/zulip,rishig/zulip,punchagan/zulip,eeshangarg/zulip,andersk/zulip,jackrzhang/zulip,tommyip/zulip,tommyip/zulip,zulip/zulip,dhcrzf/zulip,zulip/zulip,hackerkid/zulip,hackerkid/zulip,kou/zulip,shubhamdhama/zulip,tommyip/zulip,dhcrzf/zulip,showell/zulip,eeshangarg/zulip,timabbott/zulip,hackerkid/zulip,jackrzhang/zulip,jackrzhang/zulip,rht/zulip,eeshangarg/zulip,brainwane/zulip,jackrzhang/zulip,andersk/zulip,synicalsyntax/zulip,kou/zulip,kou/zulip,timabbott/zulip,rht/zulip,punchagan/zulip,zulip/zulip,zulip/zulip,rishig/zulip,dhcrzf/zulip,dhcrzf/zulip,rht/zulip,andersk/zulip,zulip/zulip,kou/zulip,tommyip/zulip,synicalsyntax/zulip,hackerkid/zulip,tommyip/zulip,punchagan/zulip,dhcrzf/zulip,zulip/zulip,showell/zulip,rishig/zulip,punchagan/zulip,showell/zulip,kou/zulip,jackrzhang/zulip,hackerkid/zulip,kou/zulip,eeshangarg/zulip,brainwane/zulip,hackerkid/zulip,showell/zulip,punchagan/zulip,showell/zulip