Fixed issue where Zapier couldn't connect because unique constraint o…

…f Membership with the user_email column because it was nil.

bullet_train-api/lib/bullet_train/platform/connection_workflow.rb

@@ -34,6 +34,7 @@ def to_proc
             faux_membership = team.memberships.create(
               user: faux_user,
               platform_agent: true,
+              user_email: faux_user.email,
               platform_agent_of: @application,
               added_by: team.memberships.find_by(user: current_user)
             )