code: @Delete("/metadata/{projectName}/tokens/{appId}")
      public CompletableFuture<Revision> removeToken(@Param("projectName") String projectName,
                                                     @Param("appId") String appId,
                                                     Author author) {
          return mds.findTokenByAppId(appId)
                    .thenCompose(token -> mds.removeToken(author, projectName, token.appId()));
      }
docs: DELETE /metadata/{projectName}/tokens/{appId}
  
  <p>Removes the {@link Token} of the specified {@code appId} from the specified {@code projectName}.