Figure 6-179 Adding the OAuth provider to the gateway 4 API discovery and testing Now you can publish the API for testing. Follow the steps in “Publish the product” on page 203  for publishing the product. You have three ways of testing the APIs: First let’s go through the Developer Portal application subscriptions.  GLYPH<SM590000> Using the Automated Application Subscriptions in the API Manager (Discussed in “Publish  the product” on page 203) GLYPH<SM590000> Using the Developer Portal Application Subscriptions  GLYPH<SM590000> Using and external REST tool like Postman client 1. You must register in the Developer Portal. To do that, click  Create account , then fill in  your information and finally click  Sign Up . See Figure 6-180 on page 290. Chapter 6. Practical agile integration  289