'Retrieves the identifiers of all of the HSMs provisioned for
the current customer.
This operation supports pagination with the use of the
NextToken member. If more results are available, the NextToken
member of the response contains a token that you pass in the
next call to ListHsms to retrieve the next set of items.
:type next_token: string
:param next_token: The NextToken value from a previous call to
ListHsms. Pass null if this is the first call.'

def list_hsms(self, next_token=None):

    params = {}
    if (next_token is not None):
        params['NextToken'] = next_token
    return self.make_request(action='ListHsms', body=json.dumps(params))
