Intercom find by external ID returns the same class with different data structures

[Startouf]

Version info

• intercom-ruby version: intercom-4.2.1
• Ruby version: ruby 2.7.2p137

Expected behavior

It is not clear what the intercom.contacts.find# method does relatively to intercom v2 API.

One would expect the method contacts#find to work when using external_ids just like the companies (which work using company_id): intercom.contacts.find(external_id: xxx). When using the library to find a user by its external ID, we're hoping to find a single user. In case of multiple users with the same external ID (is it possible in Intercom ?), the response should either throw an error (multiple matching user error) or return, to avoid confusion, a different class (like Intercom::ContactSearch or ContactList). When looking at the official REST API, the GET User endpoint seems to work only with intercom user IDs, but one could expect the Ruby gem to provide an abstraction to find users by external IDs as well.

I would have rather have a contacts.find_all method when searching for users using the search contact POST so the expected output would be an iterable list.

Is this some weird behavior introduced when migrating from v1 to v2 of the Intercom API ?

Actual behavior

The responses using contacts.find(id: xxx) and contacts.find(external_id: xxx) give two different data structures, yet they are of the same class (see example below in steps to reproduce)

Steps to reproduce

Here is an example where a call to the API returns 10 different users (they all have different external_id, but for some reason the call returns them all), and the response class is Intercom::Contact which is misleading, because it actually contains several users

irb(main):014:0> rez = intercom.contacts.find(external_id: u.id.to_s)
#<Intercom::Contact:0x000055ca48ce1a18
irb(main):015:0> rez.class
=> Intercom::Contact
irb(main):016:0> rez.data.first.class
=> Hash
irb(main):017:0> rez.data.size
=> 10

Here is the same call retuning only one user as mentioned in the documentation

irb(main):018:0> single_rez = intercom.contacts.find(id: "6558e14xxxx")
=> 
#<Intercom::Contact:0x000055ca4d1ef560
irb(main):019:0> single_rez.data
Traceback (most recent call last):
/usr/local/bundle/gems/intercom-4.2.1/lib/intercom/lib/dynamic_accessors_on_method_missing.rb:24:in `define_accessors_or_call': 'data' called on Intercom::Contact but it has not been set an attribute or does not exist as a method (Intercom::AttributeNotSetError)
irb(main):020:0> single_rez.class
=> Intercom::Contact
irb(main):021:0> single_rez.phone
=> nil

Logs