Enable Klaviyo SCIM user provisioning
1
Open Settings
Click your organization name in the lower left corner, then Settings in the modal that appears.
2
Navigate to Security
Click Security.

3
Enable SCIM Provisioning
Scroll down to System for cross-domain identity management (SCIM) and check the SCIM Provisioning box.

Generate a Klaviyo SCIM key
1
Generate SCIM Key
In the System for cross-domain identity management (SCIM) section, click Copy to display the SCIM key.

2
Copy SCIM Key
Copy or download the access key to a safe place, including the prefix 
Klaviyo-API-Key.- Note that this key is only displayed once. If copying it, paste it somewhere secure immediately.

Connecting with StackOne
1
Enter SCIM Key
Upon reaching the Link Account page, enter the SCIM key and proceed by clicking the Connect button.
