docs: def _parse_url(host, provided_protocol=None):
          """
          Process the provided host and protocol to return them in a standardized
          way that can be subsequently used by Cytomine methods.
          If the protocol is not specified, HTTP is the default.
          Only HTTP and HTTPS schemes are supported.
  
          Parameters
          ----------
          host: str
              The host, with or without the protocol
          provided_protocol: str ("http", "http://", "https", "https://")
              The default protocol - used only if the host value does not specify one
  
          Return
          ------
          (host, protocol): tuple
              The host and protocol in a standardized way (host without protocol,
              and protocol in ("http", "https"))
              
          Examples
          --------
          >>> Cytomine._parse_url("localhost-core")
          ("localhost-core", "http")
          >>> Cytomine._parse_url("https://demo.cytomine.coop", "http")
          ("demo.cytomine.coop", "https")
          """
          protocol = "http" # default protocol
          
          if host.startswith("http://"):
              protocol = "http"
          elif host.startswith("https://"):
              protocol = "https"
          elif provided_protocol is not None:
              provided_protocol = provided_protocol.replace("://", "")
              if provided_protocol in ("http", "https"):
                  protocol = provided_protocol
          
          host = host.replace("http://", "").replace("https://", "")
          if host.endswith("/"):
              host = host[:-1]
  
          return host, protocol