In order for the meshlet to connect to Zendesk to create and update tickets as well as query for changes to push to the other ITSM app being integrated, you will need to enable API access in Zendesk.
Procedure
To enable API access in Zendesk, follow these steps:
Go to the Admin Center
In Zendesk, select the icon at the bottom of the left navigation menu and click on the Go to Admin Center link.
Access Zendesk API settings
Select the Apps and integrations option and then scroll down and choose the Zendesk API option underneath APIs.
Enable API access
Toggle API access by sliding the toggle to the right for Password access and/or Token access. You can enable either option or both options for the meshlet to connect to Zendesk.
NOTE: If using Token access, click on the Add API token option to create a new token and copy this token down so you can enter it in the meshlet configuration file. Make sure to save this token value here as it will not appear again after leaving this page. Then click Save to save the token into Zendesk.
Token access requires setting the apiTokenAuth configuration to true in the meshlet configuration file. See meshlet configurations for more information.