docs: def get_belbio_conf_files():
      """Get belbio configuration from files
      """
  
      home = os.path.expanduser("~")
      cwd = os.getcwd()
  
      belbio_conf_fp, belbio_secrets_fp = "", ""
  
      env_conf_dir = os.getenv("BELBIO_CONF", "").rstrip("/")
  
      conf_paths = [
          f"{cwd}/belbio_conf.yaml",
          f"{cwd}/belbio_conf.yml",
          f"{env_conf_dir}/belbio_conf.yaml",
          f"{env_conf_dir}/belbio_conf.yml",
          f"{home}/.belbio/conf",
      ]
      secret_paths = [
          f"{cwd}/belbio_secrets.yaml",
          f"{cwd}/belbio_secrets.yml",
          f"{env_conf_dir}/belbio_secrets.yaml",
          f"{env_conf_dir}/belbio_secrets.yml",
          f"{home}/.belbio/secrets",
      ]
  
      for fn in conf_paths:
          if os.path.exists(fn):
              belbio_conf_fp = fn
              break
      else:
          log.error(
              "No BELBio configuration file found - please add one (see http://bel.readthedocs.io/en/latest/configuration.html)"
          )
  
      for fn in secret_paths:
          if os.path.exists(fn):
              belbio_secrets_fp = fn
              break
  
      return (belbio_conf_fp, belbio_secrets_fp)