API Class how to store a token for several instances

apiclass.rb

class API
  include HTTParty

  def initialize(options = {})
    @auth = {
      :username => options[:username],
      :password => options[:password]
    }
      @token = options[:token]
  end

  def create_token
    endpoint = "https://security.example.com/login"
    response = self.class.get endpoint, {
      :basic_auth => @auth
    }
    @token = response.parsed_response["token"]
  end
  
  def get_data
      header_params = {'auth-token' => "#{@token}", 'Content-Type' => 'application/json' }
      body = {name: name, url: url, data: data}
      endpoint = "https://security.example.com/data/..."
      response = self.class.post(endpoint, headers: header_params, body: body.to_json)
  end
  
end

runner.rb

instance1 = API.new(username, password)
instance1.create_token
instance1.get_data

instance2 = API.new(username, password)
instance2.create_token
instance2.get_data