diff --git a/sachet/server/models.py b/sachet/server/models.py
index 69e3752..f2e7cba 100644
--- a/sachet/server/models.py
+++ b/sachet/server/models.py
@@ -89,9 +89,13 @@ class User(db.Model):
 
         self.password = self.gen_hash(password)
         self.username = username
-        self.url = url_for("users_blueprint.user_api", username=self.username)
         self.register_date = datetime.datetime.now()
 
+    @property
+    def url(self):
+        """URL linking to this resource."""
+        return url_for("users_blueprint.user_api", username=self.username)
+
     def gen_hash(self, psswd):
         """Generates a hash from a password."""
         return bcrypt.generate_password_hash(