Передача данных из JSON API в приложение Ruby on Rails

Я получаю сообщение об ошибке no implicit conversion of String into Integer, которое поставило меня в тупик, и я не могу импортировать пользовательские записи и заполнить ими мою базу данных.

Пока у меня нет проблем с доступом к данным, но я получаю сообщение об ошибке со ссылкой на '[]' в строке с User.find... на ней.

Я использую следующий код:

require 'net/http'
require 'uri'
require 'json'
require 'faker'

#this script imports APR user data from the zendesk api and populates 
the database with it. 


uri = URI.parse("https://blahsupport.zendesk.com/api/v2/users.json")
request = Net::HTTP::Get.new(uri)
request.content_type = "application/json"
request.basic_auth("[email protected]", "blahpass")

req_options = {
  use_ssl: uri.scheme == "https",
}

@response = Net::HTTP.start(uri.hostname, uri.port, req_options) do |http|
  http.request(request)
end
puts @response.body
puts @response.message
puts @response.code

info = @response.body 

info.force_encoding("utf-8")

File.write('blahusers1.json', info)


puts "File Created Successfully!"

file = File.read('blahusers1.json')

users = JSON.load(file)

users.each do |a|
    User.find_or_create_by_zendesk_id(:zendesk_id => a['id'], :url => a['url'], :name => a['name'], :email => a['email'])
end

Есть идеи о том, как я получил эту ошибку? Спасибо за любую помощь!

**Редактировать

Ниже приведен пример возвращаемых данных.

{"users":[{"id":333653859,"url":"https://blahblah.zendesk.com/api/v2/users/333653859.json","name":"Randy Blah","email":"[email protected]","created_at":"2014-08-06T14:31:24Z","updated_at":"2018-04-04T14:22:06Z","time_zone":"Pacific Time (US & Canada)","phone":null,"shared_phone_number":null,"photo":{"url":"https://aprtechsupport.zendesk.com/api/v2/attachments/68955389.json","id":68955389,"file_name":"Work.jpg","content_url":"https://aprtechsupport.zendesk.com/system/photos/6895/5389/Work.jpg","mapped_content_url":"https://blahblah.zendesk.com/system/photos/6895/5389/Work.jpg","content_type":"image/jpeg","size":2528,"width":80,"height":80,"inline":false,"thumbnails":[{"url":"https://blahblah.zendesk.com/api/v2/attachments/68955399.json","id":68955399,"file_name":"Work_thumb.jpg","content_url":"https://blahblah.zendesk.com/system/photos/6895/5389/Work_thumb.jpg","mapped_content_url":"https://blahblah.zendesk.com/system/photos/6895/5389/Work_thumb.jpg","content_type":"image/jpeg","size":2522,"width":32,"height":32,"inline":false}]},"locale_id":1,"locale":"en-US","organization_id":null,"role":"admin","verified":true,"external_id":null,"tags":[],"alias":"","active":true,"shared":false,"shared_agent":false,"last_login_at":"2018-04-04T14:21:44Z","two_factor_auth_enabled":null,"signature":"Thanks for contacting the helpdesk!\n-Randy","details":"","notes":"","role_type":null,"custom_role_id":null,"moderator":true,"ticket_restriction":null,"only_private_comments":false,"restricted_agent":false,"suspended":false,"chat_only":false,"default_group_id":21692179,"user_fields":{}}