Fixed text repr of Explorer model due to user model change.

lostplaces/lostplaces_app/models.py

@@ -33,7 +33,7 @@ class Explorer(models.Model):
     )
 
     def __str__(self):
-        return self.user.name
+        return self.user.username
         
 @receiver(post_save, sender=User)
 def create_user_profile(sender, instance, created, **kwargs):