Post Model not showing in Admin page

#Post Model not showing in Admin page
#http://127.0.0.1:8000/admin/

#Commands I've tried (I've tried migrating and restarting server)

/Django Girls $ python3 manage.py makemigrations blog

/Django Girls $ python3 manage.py migrate blog



## Django Girls/blog/models.py
from django.db import models
from django.utils import timezone

class Post(models.Model):
    author = models.ForeignKey('auth.User')
    title = models.CharField(max_length = 200)
    text = models.TextField()
    created_date = models.DateTimeField(default = timezone.now)
    published_date = models.DateTimeField(blank=True, null=True)

    def publish(self):
        self.published_date = timezone.now()
        self.save()

    def __str__(self):
        return self.title


# Django Girls/mysite/urls.py
from django.contrib import admin
admin.autodiscover()


urlpatterns = patterns('',
    (r'^admin/', include(admin.site.urls)),
    # admin.autodiscover(),
)
# admin.autodiscover()


# Django Girls/blog/admin.py
from django.contrib import admin
from blog.models import Post

class YourModelAdmin(admin.ModelAdmin):
    pass

admin.site.register(Post, YourModelAdmin)
# admin.site.register(Post)


#Django Girls/mysite/settings.py
#Snippet
INSTALLED_APPS = [
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    'blog',
]

#Snippet