code: def get_nameid_data(request, key=None):
          
          if isinstance(request, etree._Element):
              elem = request
          else:
              if isinstance(request, Document):
                  request = request.toxml()
              elem = fromstring(request, forbid_dtd=True)
  
          name_id = None
          encrypted_entries = OneLogin_Saml2_Utils.query(elem, '/samlp:LogoutRequest/saml:EncryptedID')
  
          if len(encrypted_entries) == 1:
              if key is None:
                  raise OneLogin_Saml2_Error(
                      'Private Key is required in order to decrypt the NameID, check settings',
                      OneLogin_Saml2_Error.PRIVATE_KEY_NOT_FOUND
                  )
  
              encrypted_data_nodes = OneLogin_Saml2_Utils.query(elem, '/samlp:LogoutRequest/saml:EncryptedID/xenc:EncryptedData')
              if len(encrypted_data_nodes) == 1:
                  encrypted_data = encrypted_data_nodes[0]
                  name_id = OneLogin_Saml2_Utils.decrypt_element(encrypted_data, key)
          else:
              entries = OneLogin_Saml2_Utils.query(elem, '/samlp:LogoutRequest/saml:NameID')
              if len(entries) == 1:
                  name_id = entries[0]
  
          if name_id is None:
              raise OneLogin_Saml2_ValidationError(
                  'NameID not found in the Logout Request',
                  OneLogin_Saml2_ValidationError.NO_NAMEID
              )
  
          name_id_data = {
              'Value': OneLogin_Saml2_Utils.element_text(name_id)
          }
          for attr in ['Format', 'SPNameQualifier', 'NameQualifier']:
              if attr in name_id.attrib.keys():
                  name_id_data[attr] = name_id.attrib[attr]
  
          return name_id_data
docs: Gets the NameID Data of the the Logout Request
          :param request: Logout Request Message
          :type request: string|DOMDocument
          :param key: The SP key
          :type key: string
          :return: Name ID Data (Value, Format, NameQualifier, SPNameQualifier)
          :rtype: dict