How to retrieve Access Token and Domain name
1.Retrieve Access Token
Step 1: Login to https://www.zendesk.com/login
Step 2: You will be taken to the dashboard of Zendesk once you login.
Step 3: On the left panel select admin, after that select Go to Admin Center
Step 4: You will be navigated to Admin Center, Under Apps and Integrations select Zendesk API
Step 5: Enable Token Access and Add API Token. An API token will be generated for you.
2. How to get Domain Name
After logging in to your account in the address URL you can find your Domain Name (which would be <your_domain_name>.zendesk.com)