I'm new to django thus the question. I've the following Feed object and an User object which have a many-to-many relationship

```
class Feed(Base):
    headline = models.CharField(max_length=255)
    link = models.CharField(max_length=255)
    summary = models.TextField()
    reader = models.ManyToManyField(User, through='Bookmark')

class User(AbstractBaseUser, PermissionsMixin):
    email = models.EmailField(unique=True, max_length=255)
    mobile = PhoneNumberField(null=True)
    username = models.CharField(null=True, unique=True, max_length=255)
    full_name = models.CharField(max_length=255, blank=True, null=True)

```

The two are related using the Bookmark object.

```
class Bookmark(Base):
    user = models.ForeignKey(User, on_delete=models.CASCADE, null=True)
    feed = models.ForeignKey(Feed, on_delete=models.CASCADE, null=True)

```

My question is,

1. How do I add a bookmark(or rather feed) to the user?
2. How do I fetch all the feeds the User has bookmarked?

Any help appreciated.