V851 mpp_facekit_demo

T_00_T LV 4

请问文档中key.h如何替换呢，在MPP的sample使用说明中提示需要联系官方获取。

运行人脸检测应用报错如下

T_00_T LV 4

> detect user environment:
I0101 00:01:44.361453  1093 mpi_sys.c:1074]                 <MonitorEnvVarThread> /tmp/mpp_log_level
I0101 00:01:44.361671  1093 mpi_sys.c:1075]                 <MonitorEnvVarThread> /tmp/mpp_venc_sei_config_param
open /sys/class/sunxi_info/sys_info failed.
I0101 00:01:44.407266  1082 ai_facekit.c:186]               <ai_init> file:/mnt/extsd/pix_allwinner_facekit_v1.4.bin,size:2451836
load_file: /mnt/extsd/pix_allwinner_facekit_v1.4.bin
**Fail to verify license key**
E0101 00:01:44.465355  1082 ai_facekit.c:204]               <ai_init> pix_init_facekit_model error  status: -8888
open /sys/class/sunxi_info/sys_info failed.
0x000x000x000x000x000x000x000x000x040x000x000x000x2c0x000x000x000xd40xff0xff0x7f0x000x000x000x000x000x000x000x000x000x000x000x00
E0101 00:01:44.474221  1082 sample_facekit_demo.c:1520]     <main> init error!

打开模型文件时提示验证license key错误，请问这个问题该怎么解决呢？