Django Rest Framework, how to properly implement serializers?

Question

Django

Good afternoon!
Let's say there are two models

class UserProfile(AbstractUser):
    middle_name = models.CharField(max_length=1000, blank=True, null=True)
    type = models.ForeignKey(UserType, blank=True, null=True, on_delete=models.SET_NULL)

class Driver(models.Model):
    first_name = models.CharField(max_length=1000, blank=True, null=True)
    middle_name = models.CharField(max_length=1000, blank=True, null=True)
    last_name = models.CharField(max_length=1000, blank=True, null=True)
    driver_license = models.CharField(max_length=1000, blank=True, null=True)
    user = models.ForeignKey(settings.AUTH_USER_MODEL, blank=True, null=True, on_delete=models.SET_NULL)

Those. There are drivers who are tied to a specific user. And serializers to read them:

class UserProfileReadSerializer(serializers.ModelSerializer):
    type = UserTypeSerializer()
    class Meta:
        model = UserProfile
        fields = ['id', 'username', 'last_name', 'first_name', 'middle_name', 'email', 'type', 'password', 'is_superuser', 'last_login', 'date_joined']

class DriverReadSerializer(serializers.ModelSerializer):
    user = UserProfileReadSerializer()
    class Meta:
        model = Driver
        fields = ['id', 'last_name', 'first_name', 'middle_name', 'driver_license', 'user']

The fact is that when requesting a list of drivers, the user field gives out a complete set of user data (which is, in principle, logical and understandable), and the user also has a nested user type, and this is additional. data, and as a result, a big footcloth, but I would like to issue only username to visually display the driver's belonging to the user, and it is username, not id.
Question: what is the best way to implement this? Do I need to make a separate serializer for the user with only the username field? Or are there better solutions?