code: public List<GitlabSSHKey> getSSHKeys(Integer targetUserId) throws IOException {
          String tailUrl = GitlabUser.USERS_URL + "/" + targetUserId + GitlabSSHKey.KEYS_URL;
          return Arrays.asList(retrieve().to(tailUrl, GitlabSSHKey[].class));
      }
docs: Gets all ssh keys for a user
  
  @param targetUserId The id of the GitLab User
  @return The list of user ssh keys
  @throws IOException on gitlab api call error