====== Sign-ups, users, logins ======
We want to add users into out application. First we create a new application
   python manage.py startapp customers

models.py
<code python>
# null= se tyka databaze, kdezto
# blank= se tyka vyplneni formulare
from django.utils.encoding import smart_unicode

class customer(models.Model): 
        first_name = models.CharField(max_length=120, null=True, blank=True)
        last_name = models.CharField(max_length=120, null=True, blank=True)
        email = models.EmailField(null=False, blank=False)
        registered = models.DateTimeField(auto_now_add=True, auto_now=False)
        updated = models.DateTimeField(auto_now_add=True, auto_now=False)

        def __unicode__(self):
               return self.email
</code>

admin.py
<code python>
from .models import customer

# Register your models here.
class customer_admin(admin.ModelAdmin):
        class Meta:
                model = customer

admin.site.register(customer, customer_admin)
</code>