Called by:

• Mobilizon.GraphQL.Resolvers.Participant.actor_join_event (L58)
• Mobilizon.GraphQL.Resolvers.Participant.actor_join_event (L65)
• Mobilizon.Users.User.save_confirmation_token (L210)
• Mobilizon.Users.update_user_email (L153)
• Mobilizon.Web.Email.User.send_password_reset_email (L149)