perf: 用户添加密码 设置是否已存在 (#10138)

Co-authored-by: feng <1304903146@qq.com>

apps/users/serializers/profile.py

@@ -58,10 +58,11 @@ class UserUpdatePasswordSerializer(serializers.ModelSerializer):
 class UserUpdateSecretKeySerializer(serializers.ModelSerializer):
     new_secret_key = EncryptedField(required=True, max_length=128)
     new_secret_key_again = EncryptedField(required=True, max_length=128)
+    has_secret_key = serializers.BooleanField(read_only=True, source='secret_key')
 
     class Meta:
         model = User
-        fields = ['new_secret_key', 'new_secret_key_again']
+        fields = ['has_secret_key', 'new_secret_key', 'new_secret_key_again']
 
     def validate(self, values):
         new_secret_key = values.get('new_secret_key', '')