handle errors #8
Description
Errors are not taken into account.
There are two error kinds:
Invocation error
https://docs.aws.amazon.com/lambda/latest/dg/runtimes-api.html#runtimes-api-invokeerror
Initialization error
https://docs.aws.amazon.com/lambda/latest/dg/runtimes-api.html#runtimes-api-initerror