You can change your personal details for your Funnel login at any time by visiting your Profile. Click on the person icon on the left hand side menu and click 'Profile'.
Once you're in your profile, in the 'Identity' section, there is an option to 'Manage your personal details'. To change your details, click the pen icon on the top right hand side of the box.
Make the changes you need to your personal details and click 'Update Details'.
Your details will be updated immediately and you'll see the below pop-up on the page.