I have unpacked the file and viewed it in notepad++, this is how I found the mySQL user credentials for the lost database, whats confusing to me is I can also find chunks of the table structure in the text document too
{\"sorted_col\":\"`E8ZmYXcDn_users`.`user_registered` DESC\"}','2022-04-14...
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The issue began when I removed a subscription from a plesk server that was a staging site for the main site that was also on the same server. However unaware to me the wp-config for the live site had never been changed to point to a different MySQL database and when I removed the subscription...