Error when using booleans

[danial-k]

If the input includes a non-string boolean, the following error is raised: object of type 'bool' has no len().
Stack trace:

File "/var/task/app.py ", line 21, in handler     app_provider =  AppProvider(event)
File "/var/task/app_handler/provider/app.py ", line 29, in __init__     self.process(event)
File "/var/task/app_handler/provider/app.py ", line 60, in process     self.response = self.get_response(event)
File "/var/task/app_handler/provider/app.py ", line 70, in get_response     self.app_runner.run(event)
File "/var/task/app_handler/runner/app.py ", line 55, in run     if len(self.request_body[field]) == 0: