Changes for refresh amazon app client secret

lib/muffin_man/api_account_credential/credential_helper.rb

@@ -0,0 +1,20 @@
+module MuffinMan::ApiAccountCredential 
+  class CredentialHelper
+    NEW_APP_CREDENTIAL_URL = "https://sellingpartnerapi-na.amazon.com/applications/2023-11-30/clientSecret".freeze
+
+    def self.create_new_credentials(access_token)
+      response = Typhoeus.post(
+        NEW_APP_CREDENTIAL_URL,
+        headers: {
+          "x-amz-access-token" => "#{access_token}"
+        }
+      )
+      if response.code != 204
+        error_body = JSON.parse(response.body)
+        error = "#{error_body['error']}: #{error_body['error_description']} "
+        raise MuffinMan::Error, error
+      end
+      response.code
+    end
+  end
+end

lib/muffin_man/lwa/auth_helper.rb

@@ -23,5 +23,27 @@ def self.get_refresh_token(client_id, client_secret, auth_code)
       end
       JSON.parse(response.body)["refresh_token"]
     end
+
+    def self.get_client_credential_refresh_token(client_id, client_secret)
+      body = {
+        grant_type: "client_credentials",
+        client_id: client_id,
+        client_secret: client_secret
+      }
+
+      response = Typhoeus.post(
+        ACCESS_TOKEN_URL,
+        body: URI.encode_www_form(body),
+        headers: {
+          "Content-Type" => "application/x-www-form-urlencoded;charset=UTF-8"
+        }
+      )
+      if response.code != 200
+        error_body = JSON.parse(response.body)
+        error = "#{error_body["error"]}: #{error_body["error_description"]}"
+        raise MuffinMan::Error, error
+      end
+      JSON.parse(response.body)["refresh_token"]
+    end
   end
 end