<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def login(self) -> bool: """Return True if log in request succeeds"""

        user_check = isinstance(self.username, str) and len(self.username) > 0
        pass_check = isinstance(self.password, str) and len(self.password) > 0

        if user_check and pass_check:
            response, _ = helpers.call_api(
                '/cloud/v1/user/login',
                'post',
                json=helpers.req_body(self, 'login')
            )

            if response and helpers.check_response(response, 'login'):
                self.token = response['result']['token']
                self.account_id = response['result']['accountID']
                self.enabled = True

                return True
            else:
                logger.error('Error logging in with username and password')
                return False

        else:
            if user_check is False:
                logger.error('Username invalid')
            if pass_check is False:
                logger.error('Password invalid')

        return False