Fix an image issue.
diff --git a/docs/.vuepress/public/assets/users-20191216.png b/docs/.vuepress/public/assets/users-20191216.png
index c6aea77..7f54786 100644
--- a/docs/.vuepress/public/assets/users-20191216.png
+++ b/docs/.vuepress/public/assets/users-20191216.png
Binary files differ
diff --git a/docs/.vuepress/public/assets/users.png b/docs/.vuepress/public/assets/users.png
index c6aea77..7f54786 100644
--- a/docs/.vuepress/public/assets/users.png
+++ b/docs/.vuepress/public/assets/users.png
Binary files differ