Validates whether the user trying to link the WebID is the actual owner of that WebID.
Pod store to find out if the account created the pod containing the WebID.
Before calling the OwnershipValidator, we first check if the target WebID is in a pod owned by the user.
Route used to generate the WebID link resource URL.
WebID store to store WebID links.
Base URL of the server. Used to indicate in the response what the object of the
solid:oidcIssuer
triple should be.