add docstrings

profiles/models.py

@@ -4,7 +4,7 @@ from django.contrib.auth.models import User
 
 class Profile(models.Model):
     """
-    Defines a service user
+    Model of a user of the service
     """
     user = models.OneToOneField(User, on_delete=models.CASCADE)
     favorite_city = models.CharField(max_length=64, blank=True)