Extend config with webhook_token

lib/onfido/configuration.rb

@@ -4,7 +4,8 @@ module Configuration
       us: "api.us.onfido.com"
     }.freeze
 
-    attr_accessor :api_key, :region, :open_timeout, :read_timeout, :api_version
+    attr_accessor :api_key, :region, :open_timeout, :read_timeout, :api_version,
+                  :webhook_token
 
     def self.extended(base)
       base.reset
@@ -16,6 +17,7 @@ def configure
 
     def reset
       self.api_key = nil
+      self.webhook_token = nil
       self.region = nil
       self.open_timeout = 30
       self.read_timeout = 80

lib/onfido/resources/webhook.rb

@@ -18,7 +18,7 @@ def all(page: 1, per_page: 20)
     # As well as being a normal resource, Onfido::Webhook also supports
     # verifying the authenticity of a webhook by comparing the signature on the
     # request to one computed from the body
-    def self.valid?(request_body, request_signature, token)
+    def self.valid?(request_body, request_signature, token = Onfido.webhook_token)
       if [request_body, request_signature, token].any?(&:nil?)
         raise ArgumentError, "A request body, request signature and token " \
                              "must be provided"