In your dashboard, click Connect in the sidebar and open the Access tab. Your token is under Authentication Token; click Copy. Direct link: memoryplugin.com/dashboard/connect?tab=access.
The token used to live under Settings → Integrations. It moved to Connect when the Connect page launched, and Settings no longer has an Integrations tab.
Treat the token like a password. It grants full access to your memories and chat history. If it leaks, click Regenerate on the same Access tab; the old token stops working immediately.