code: def _get_deprecated_jwt_issuers():
      
      # If JWT_ISSUERS is not defined, attempt to return the deprecated settings.
      warnings.warn(
          "'JWT_ISSUERS' list not defined, checking for deprecated settings.",
          DeprecationWarning
      )
  
      return [
          {
              'ISSUER': api_settings.JWT_ISSUER,
              'SECRET_KEY': api_settings.JWT_SECRET_KEY,
              'AUDIENCE': api_settings.JWT_AUDIENCE
          }
      ]
docs: Internal helper to retrieve the deprecated set of JWT_ISSUER data from the JWT_AUTH configuration
      Having this allows for easier testing/mocking