Fixed errors

class SubmissionRefusedError(PortalAPIError):

    def __init__(self, reason):

        super().__init__(code=429, message=reason)

        super().__init__(code=400, message=reason)

class WorkerNotAvailable(PortalServiceError):

        self.message = message or "Worker is not available"

class SubmissionDiffTimeError(SubmissionRefusedError):

class SubmissionDiffTimeError(PortalAPIError):

    def __init__(self, project: Project, diff_time, user: User = None):

        log_user = f'by {user.log_name} ' if user else ''

        when = time.current_time() + diff_time