Login to your Togoparts Account.
If you're on mobile, click on the ☰ icon on the top right corner of the screen and tap on Connect STRAVA.
If you're on a desktop, click on the dropdown button beside your account picture on the top right and click on Connect STRAVA.
Follow all the steps you see on the screen and make sure you tick all of the permissions requested as shown in the screenshot. This is required in order for Togoparts to sync your activities from STRAVA.