gistfile1.py

    name = models.CharField(max_length=32)
    description = models.TextField(blank=True,
                                   help_text='Seria Bom voce inserir uma descricao')
    user=models.CharField(max_length=32)
    img = ProcessedImageField(upload_to='services',
                                           processors=[ResizeToFill(200, 200)],
                                           format='JPEG',
                                           options={'quality': 60})
    geometry = models.PointField(srid=4326)
    objects = models.GeoManager()
    added = models.DateTimeField(auto_now_add=True)
    updated = models.DateTimeField(auto_now=True)

Na linha número 4, substitua por

user = models.ForeignKey("auth.User")