To integrate with Klaviyo, simply follow the steps below:

1. Log into your LeadsTunnel account.

2. On the left navigation menu, click on your account email to expand the drop down menu. Then, select "Account".

3. Click on "Integrations".

4. Under "Integrations", click on the "Add New Autoresponder/ CRM" button.
5. Select "Klaviyo" from the Autoresponder System drop-down menu.

6. Log into your Klaviyo account.
7. On the top right corner, where it shows your account name, click to expand a drop down menu. Then, select "Account".

8. Under "Settings", select "API Keys". 

9. Then, under "Private API Keys", copy your API Key back to LeadsTunnel's "api_key" field.

10. Finally, name your CRM (Note: The CRM name is for internal use only, so you can name it to anything).
11. Click "Connect" to complete the integration.