# userId property Null safety

String userId
read / write

`userId` that engages in mixtranscoding

## Implementation

    String userId;

1. tencent_trtc_cloud
2. trtc_cloud_def
3. TRTCMixUser
4. userId property

##### TRTCMixUser class

1. Constructors
2. TRTCMixUser
3. Properties
4. hashCode
5. height
6. inputType
7. pureAudio
8. roomId
9. runtimeType
10. streamType
11. userId
12. width
13. x
14. y
15. zOrder
16. Methods
17. noSuchMethod
18. toJson
19. toString
20. Operators
21. operator ==