Proper Error Message Added

Author: ~SH4DOW ROOT

app.py

@@ -34,5 +34,8 @@ def getPR(site, username):
 
 if __name__ == '__main__':
     click.echo("Welcome to Code Review System\n")
-    execute_board()
+    try:
+        execute_board()
+    except yaml.YAMLError as exc:
+        print(exc)