In case it hasn't been made completely clear, there's a subtle distinction to be made.
WikiTree does not have raw DNA information of any kind. Instead, it has a symbiotic relationship with a free web site called GEDmatch.com, which DOES have a DNA database, and the tools to make use of it.
A given DNA test uploaded to GEDmatch is given a unique ID number, called a "kit number". This number is, of course, all-important. You add that kit number to the WikiTree profile of the person who was tested (with permission, and in accordace with privacy rules).
So WikiTree has REFERENCES TO the DNA data in a DNA database, but does not keep the data here itself. These references tell fellow WikiTree users who might be related to you that there's a test that they may be able to match against (on GEDmatch), and then use the results in DNA confirmation here (on WikiTree).
In collaboration with WikiTree, GEDmatch.com also makes the WikiTree pedigree for the test-taker available for view, right from the GEDmatch site. When you pull up your "one-to-many" matches on GEDmatch, there a column where you can click on links to either GED trees or WikiTree trees. It takes up to about 24 hours for that to appear, after a GEDmatch Kit number is added to a WikiTree profile.
Like I said - it's a sort of symbiotic relationship. WikiTree references GEDmatch; GEDmatch gets your pedigree info from WikiTree.