If your "User Data" is disappearing its because your browser's "local storage" cookies are disappearing.   That's controlled in your browser settings:

Chrome Fix:

From Chrome's "MoreMenu"(⋮) click "settings" then 'Privacy and Security' then "Cookies and other site data".  In that box find   "Sites that can always use cookies".   Click the "add" button and enter   odspecs.com.

Firefox Fix:

Click "tools" (browser's top bar). → options. Click on "Privacy and Security" (left column). Scroll down to "Cookies and Site Data". Click 'Manage Exceptions...'. The resulting popup box will have an input field for "Address of website".  There type    odspecs.com   Then click "Allow".