minor: Use local instead of class `self.bot_user`.
minor: Use local instead of class `self.bot_user`.

timabbott/zulip,eeshangarg/zulip,rht/zulip,brainwane/zulip,timabbott/zulip,zulip/zulip,eeshangarg/zulip,kou/zulip,andersk/zulip,hackerkid/zulip,zulip/zulip,zulip/zulip,hackerkid/zulip,eeshangarg/zulip,brainwane/zulip,andersk/zulip,rht/zulip,synicalsyntax/zulip,andersk/zulip,brainwane/zulip,eeshangarg/zulip,eeshangarg/zulip,synicalsyntax/zulip,zulip/zulip,kou/zulip,punchagan/zulip,zulip/zulip,timabbott/zulip,showell/zulip,kou/zulip,rht/zulip,showell/zulip,synicalsyntax/zulip,andersk/zulip,andersk/zulip,showell/zulip,shubhamdhama/zulip,punchagan/zulip,brainwane/zulip,hackerkid/zulip,rht/zulip,timabbott/zulip,zulip/zulip,punchagan/zulip,hackerkid/zulip,kou/zulip,hackerkid/zulip,synicalsyntax/zulip,synicalsyntax/zulip,timabbott/zulip,showell/zulip,brainwane/zulip,punchagan/zulip,rht/zulip,kou/zulip,hackerkid/zulip,punchagan/zulip,rht/zulip,punchagan/zulip,synicalsyntax/zulip,andersk/zulip,timabbott/zulip,shubhamdhama/zulip,eeshangarg/zulip,timabbott/zulip,brainwane/zulip,synicalsyntax/zulip,kou/zulip,rht/zulip,shubhamdhama/zulip,shubhamdhama/zulip,shubhamdhama/zulip,zulip/zulip,showell/zulip,andersk/zulip,shubhamdhama/zulip,kou/zulip,shubhamdhama/zulip,showell/zulip,showell/zulip,brainwane/zulip,hackerkid/zulip,punchagan/zulip,eeshangarg/zulip