Add user NIO (#88)

diff --git a/docs/assets/logo/users/nio.png b/docs/assets/logo/users/nio.png
new file mode 100644
index 0000000..ea9480d
--- /dev/null
+++ b/docs/assets/logo/users/nio.png
Binary files differ
diff --git a/docs/user.md b/docs/user.md
index e5f51dc..a87a37b 100644
--- a/docs/user.md
+++ b/docs/user.md
@@ -117,4 +117,7 @@
     <div class="companyItem">
        <img class="companyItemImg" src="../assets/logo/users/jjworld.png">
     </div>
+    <div class="companyItem">
+       <img class="companyItemImg" src="../assets/logo/users/nio.png">
+    </div>
 </div>