If you are the account owner, you can transfer ownership to another user on your account. Before trying to transfer ownership, make sure you have added the user who will become the new owner of your account.
When you are ready to transfer ownership, open your Users page and click on your own User profile (you will see an Owner badge next to your name). Scroll down and click the button labeled Transfer ownership. From the dropdown for New owner, select the user you want to transfer account ownership to. Enter your password to confirm and click Transfer ownership to finalize the transfer.