code: def create_customer(self, email, displayName):
          
          url = self._options['server'] + '/rest/servicedeskapi/customer'
          headers = {'X-ExperimentalApi': 'opt-in'}
          r = self._session.post(url, headers=headers, data=json.dumps({
              'email': email,
              'displayName': displayName
          }))
  
          raw_customer_json = json_loads(r)
  
          if r.status_code != 201:
              raise JIRAError(r.status_code, request=r)
          return Customer(self._options, self._session, raw=raw_customer_json)
docs: Create a new customer and return an issue Resource for it.
  
          :param email: Customer Email
          :type email: str
          :param displayName: Customer display name
          :type displayName: str
          :rtype: Customer