如何在使用简单JWT时向Djoser token字段添加自定义序列化程序？

from rest_framework_simplejwt.serializers import TokenObtainPairSerializer

class CustomTokenObtainPairSerializer(TokenObtainPairSerializer):
    @classmethod
    def get_token(cls, user):
        token = super().get_token(user)

        # 添加自定义字段
        token['custom_field'] = user.custom_field

        return token

# settings.py

DJOSER = {
    'SERIALIZERS': {
        'token_obtain_pair': 'your_app.serializers.CustomTokenObtainPairSerializer',
    }
}