code: def create_repo(self, repo_name, description=None):
          
          req = proto.CreateRepoRequest(repo=proto.Repo(name=repo_name), description=description)
          self.stub.CreateRepo(req, metadata=self.metadata)
docs: Creates a new Repo object in PFS with the given name. Repos are the 
          top level data object in PFS and should be used to store data of a
          similar type. For example rather than having a single Repo for an
          entire project you might have separate Repos for logs, metrics,
          database dumps etc.
          
          Params:
          * repo_name: Name of the repo.
          * description: Repo description.