Replace the hand-rolled credential chain (static, ECS endpoint, EC2
role) with config.LoadDefaultConfig, which handles the full standard
AWS credential resolution chain automatically.
Co-authored-by: Neil McGibbon <code@neilmcgibbon.com>
Signed-off-by: Bryan Frimin <bryan@getprobo.com>
Apply five style rules: convert iota string enums to typed
string constants, replace errors.As with errors.AsType,
merge three-group imports into two groups, fix multiline
parameter/argument formatting, and replace fmt.Sprintf URL
construction with net/url.
Signed-off-by: Émile Ré <emile@probo.com>
