What you do is add your Ancestry information (Not the DNA data itself) in WikiTree.
To do that, go to the Add Tab and choose “DNA Test Information” then scroll to the section that says “Add New Test Information”. Then select AncestryDNA, then enter your Ancestry.com user name and then hit the “Add Test” button. WikiTree will then in a few hours add you as an ancestry.com test taker to your connected ancestors.