In your Zendesk SELL account, go to Settings > Integrations > OAuth, and click on + Add Access Token button under Access Tokens tab.
2. Fill in Description field, can be anything, and make sure next checkboxes are marked:
Read access to all your data, except for the account and user info.
Read access to the account and users info only.
3. Press Save button.
4. Copy and store generated token somewhere safe, as it will is shown only once.
Open PowerBI Connector for Zendesk Application, and select Tokens from the left-side menu.
Insert your Zendesk PAT Token into PAT Token field and press Add button.