The personal data of an account can be downloaded in the settings of the user account. These can be accessed by clicking on your own profile picture in the lower left corner and then selecting the option "My Account ...".
Opening the user account settings
There is a button next to the heading "Edit your profile", represented by three dots in a circle, through which the option "Download personal data" can be selected.
Downloading the personal data
Clicking on this button downloads a zip file containing all personal data of the account, such as stored settings, IP addresses, etc.