Fixing issue: #45 Invalid URL in region us-east-1

[Teippo2020]

Fixing issue: #45
When the region is us-east-1 the URL should be built in another way than the other regions (regions in China do not apply this rule)

[Fausto95]

Can you please update your branch and keep the switch statement instead of the if statement

[Teippo2020]

I don't see any problem using the if statement, besides, we use two different variables countryCode and region. I think an if/else seems more readable than a switch in this case.

[Fausto95]

Using countryCode is the better way IMO,
case countryCode === us then format the url

[jpwiddy]

FYI - at the rate this is maintained, you're best off using the plain-jane aws-sdk

[wvicioso]

@Fausto95 Switch won't work in this case since we are only aware 'us-east-1' causes the problem. using countryCode === 'us' might raise issues for other users