docs: def delete_key(self):
          """Delete an existing API Key."""
          print("This command will delete an API key.")
          apiKeyID = input("API Key ID: ")
          try:
              self._curl_bitmex("/apiKey/",
                                postdict={"apiKeyID": apiKeyID}, verb='DELETE')
              print("Key with ID %s disabled." % apiKeyID)
          except:
              print("Unable to delete key, please try again.")
              self.delete_key()