Switches example code to directly use get_credentials instead of storing them and reusing later.
Switches example code to directly use get_credentials instead of storing them and reusing later.

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