Update users_comments.md

AtsushiSakai · web-flow · commit 8eef2fd7bbda · 2019-09-12T21:24:20.000+09:00
diff --git a/users_comments.md b/users_comments.md
@@ -375,6 +375,11 @@ Thanks for your job! <br>I have learned a lot from it!
 
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+Dear Atsushi Sakai, <br>Thank you so much for creating PythonRobotics and documenting it so well. I am a senior in high school trying to learn and better myself in these concepts.
+
+--Rohan Mathur
+
+
 
 # Citations
 
