[Bug Fix][Enhance] PTT update lately & Register rate limiter

- Fix a bug that PTT updates delay to next play.
- Add the IP and the device rate limiters for user register.

latest version/api/api_code.py

@@ -32,6 +32,7 @@ CODE_MSG = {
     -210: 'Username exists',
     -211: 'Email address exists',
     -212: 'User code exists',
+    -213: 'Too many register attempts',
     -999: 'Unknown error'
 }