Refactors main to not have compiler warnings.
Refactors main to not have compiler warnings.

noggleboggle/rusoto,matthewkmayer/rust-aws,mthjones/rusoto,mattico/rusoto,mthjones/rusoto,cmsd2/rusoto,matthewkmayer/rust-aws,indiv0/rusoto,DualSpark/rust-aws,DualSpark/rust-aws,rusoto/rusoto,DualSpark/rusoto,DualSpark/rust-aws,matthewkmayer/rust-aws,mattico/rusoto,SecurityInsanity/rusoto,SecurityInsanity/rusoto,DualSpark/rusoto,ford-prefect/rusoto,mattico/rusoto,ford-prefect/rusoto,DualSpark/rusoto,rusoto/rusoto,rusoto/rusoto