code: public CompletableFuture<Token> findTokenByAppId(String appId) {
          requireNonNull(appId, "appId");
          return tokenRepo.fetch(INTERNAL_PROJ, Project.REPO_DOGMA, TOKEN_JSON)
                          .thenApply(tokens -> tokens.object().get(appId));
      }
docs: Returns a {@link Token} which has the specified {@code appId}.