It should be possible to iteratively add recipients to an email

[esquivalient]

(rdbg) itme.recipients << "[email protected]"    # ruby
eval error: EmailUser(#17760) expected, got "[email protected]" which is an instance of String(#3440)
  /Users/esquivalient/.rbenv/versions/3.1.0/lib/ruby/gems/3.1.0/gems/activerecord-7.0.3.1/lib/active_record/associations/association.rb:299:in `raise_on_type_mismatch!'
  /Users/esquivalient/.rbenv/versions/3.1.0/lib/ruby/gems/3.1.0/gems/activerecord-7.0.3.1/lib/active_record/associations/has_many_through_association.rb:17:in `block in concat'
  /Users/esquivalient/.rbenv/versions/3.1.0/lib/ruby/gems/3.1.0/gems/activerecord-7.0.3.1/lib/active_record/associations/has_many_through_association.rb:16:in `each'
  /Users/esquivalient/.rbenv/versions/3.1.0/lib/ruby/gems/3.1.0/gems/activerecord-7.0.3.1/lib/active_record/associations/has_many_through_association.rb:16:in `concat'
  /Users/esquivalient/.rbenv/versions/3.1.0/lib/ruby/gems/3.1.0/gems/activerecord-7.0.3.1/lib/active_record/associations/collection_proxy.rb:1032:in `<<'
  (rdbg)//Users/esquivalient/Dropbox/code/burndown/test/models/invite_team_member_email_test.rb:1:in `block in <class:InviteTeamMemberEmailTest>'
nil

doesn't work, but

(rdbg) itme.recipients = ["[email protected]"]    # ruby
[#<ActiveMailer::EmailUser:0x000000010efb6558
  id: 9,
  email_address: "[email protected]",
  created_at: Thu, 04 Aug 2022 19:34:23.486894000 UTC +00:00,
  updated_at: Thu, 04 Aug 2022 19:34:23.486894000 UTC +00:00>]
(rdbg)

does. That's a needless paper cut.