How to make a script like e.g. 'script/mailman_server' work for multiple users in a Rails app -

i have rails app uses mailman gem (link) collect inbound pop3 mails , stuff them. works fine, wish have multiple users sign , receive mails pop3 configuration. mailman run in 'script/mailman_server', , unfamiliar how make script (thats running own process) work multiple users. enlighten me on subject or link resource touches subject?

this code of now

# script/mailman_server  #!/usr/bin/env ruby require "rubygems" require "bundler/setup" require "mailman"  mailman.config.pop3 = {   :username => 'some_name@some_email.com',   :password => 'some_password',   :server   => 'pop.gmail.com',   :port     => 995,   :ssl      => true }  mailman::application.run   default     email.receive_mail(message)   end end   # app/models/email.rb  class email   include mongoid::document   include mongoid::timestamps    field :from, type: string   field :subject, type: string   field :body, type: string    belongs_to :customer, :inverse_of => :emails    def self.receive_mail(message)     email = email.create!(subject: message.subject, body: message.body.decoded, from: message.from.first)   end end