feat: Updating aws-sdk-go to support Regional STS endpoints (#244)

* Updating aws-sdk-go to support Regional STS endpoints

* Update vendor folder

go.mod

@@ -3,11 +3,9 @@ module github.com/segmentio/aws-okta
 require (
 	github.com/99designs/keyring v1.0.0
 	github.com/alessio/shellescape v0.0.0-20190409004728-b115ca0f9053
-	github.com/aws/aws-sdk-go v0.0.0-20170323003848-3bc643c63c6f
+	github.com/aws/aws-sdk-go v1.25.25
 	github.com/bmizerany/assert v0.0.0-20160611221934-b7ed37b82869 // indirect
-	github.com/go-ini/ini v1.39.0 // indirect
 	github.com/inconshreveable/mousetrap v1.0.0 // indirect
-	github.com/jmespath/go-jmespath v0.0.0-20180206201540-c2b33e8439af // indirect
 	github.com/keybase/go-keychain v0.0.0-20190604185112-cc436cc9fe98 // indirect
 	github.com/konsorten/go-windows-terminal-sequences v1.0.2 // indirect
 	github.com/marshallbrekka/go-u2fhost v0.0.0-20170128051651-72b0e7a3f583

go.sum

@@ -2,8 +2,8 @@ github.com/99designs/keyring v1.0.0 h1:O2nCc8QRO2yeO7ncdR7bd17cdofhM8AXug42ahzEs
 github.com/99designs/keyring v1.0.0/go.mod h1:qVCfjMddwdzjgy848stNe9eTPmovvxF1lhJvOD6LUEo=
 github.com/alessio/shellescape v0.0.0-20190409004728-b115ca0f9053 h1:H/GMMKYPkEIC3DF/JWQz8Pdd+Feifov2EIgGfNpeogI=
 github.com/alessio/shellescape v0.0.0-20190409004728-b115ca0f9053/go.mod h1:xW8sBma2LE3QxFSzCnH9qe6gAE2yO9GvQaWwX89HxbE=
-github.com/aws/aws-sdk-go v0.0.0-20170323003848-3bc643c63c6f h1:jUaGnP0b/8/iuYRSz0wldEkOmRa6Veb/bRy55KOdQwQ=
-github.com/aws/aws-sdk-go v0.0.0-20170323003848-3bc643c63c6f/go.mod h1:ZRmQr0FajVIyZ4ZzBYKG5P3ZqPz9IHG41ZoMu1ADI3k=
+github.com/aws/aws-sdk-go v1.25.25 h1:j3HLOqcDWjNox1DyvJRs+kVQF42Ghtv6oL6cVBfXS3U=
+github.com/aws/aws-sdk-go v1.25.25/go.mod h1:KmX6BPdI08NWTb3/sm4ZGu5ShLoqVDhKgpiN924inxo=
 github.com/bmizerany/assert v0.0.0-20160611221934-b7ed37b82869 h1:DDGfHa7BWjL4YnC6+E63dPcxHo2sUxDIu8g3QgEJdRY=
 github.com/bmizerany/assert v0.0.0-20160611221934-b7ed37b82869/go.mod h1:Ekp36dRnpXw/yCqJaO+ZrUyxD+3VXMFFr56k5XYrpB4=
 github.com/danieljoos/wincred v1.0.2 h1:zf4bhty2iLuwgjgpraD2E9UbvO+fe54XXGJbOwe23fU=
@@ -13,8 +13,6 @@ github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/dvsekhvalnov/jose2go v0.0.0-20180829124132-7f401d37b68a h1:mq+R6XEM6lJX5VlLyZIrUSP8tSuJp82xTK89hvBwJbU=
 github.com/dvsekhvalnov/jose2go v0.0.0-20180829124132-7f401d37b68a/go.mod h1:7BvyPhdbLxMXIYTFPLsyJRFMsKmOZnQmzh6Gb+uquuM=
-github.com/go-ini/ini v1.39.0 h1:/CyW/jTlZLjuzy52jc1XnhJm6IUKEuunpJFpecywNeI=
-github.com/go-ini/ini v1.39.0/go.mod h1:ByCAeIL28uOIIG0E3PJtZPDL8WnHpFKFOtgjp+3Ies8=
 github.com/godbus/dbus v4.1.0+incompatible h1:WqqLRTsQic3apZUK9qC5sGNfXthmPXzUZ7nQPrNITa4=
 github.com/godbus/dbus v4.1.0+incompatible/go.mod h1:/YcGZj5zSblfDWMMoOzV4fas9FZnQYTkDnsGvmh2Grw=
 github.com/gopherjs/gopherjs v0.0.0-20181017120253-0766667cb4d1 h1:EGx4pi6eqNxGaHF6qqu48+N2wcFQ5qg5FXgOdqsJ5d8=
@@ -92,6 +90,7 @@ golang.org/x/sys v0.0.0-20190516110030-61b9204099cb h1:k07iPOt0d6nEnwXF+kHB+iEg+
 golang.org/x/sys v0.0.0-20190516110030-61b9204099cb/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20190710143415-6ec70d6a5542 h1:6ZQFf1D2YYDDI7eSwW8adlkkavTB9sw5I24FVtEvNUQ=
 golang.org/x/sys v0.0.0-20190710143415-6ec70d6a5542/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/text v0.3.0 h1:g61tztE5qeGQ89tm6NTjjM9VPIm088od1l6aSorWRWg=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/tools v0.0.0-20190328211700-ab21143f2384/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs=
 golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7 h1:9zdDQZ7Thm29KFXgAX/+yaf3eVbP7djjWp/dXAppNCc=

lib/okta.go

@@ -17,6 +17,7 @@ import (
 
 	"github.com/99designs/keyring"
 	"github.com/aws/aws-sdk-go/aws"
+	"github.com/aws/aws-sdk-go/aws/endpoints"
 	"github.com/aws/aws-sdk-go/aws/session"
 	"github.com/aws/aws-sdk-go/service/sts"
 	"github.com/segmentio/aws-okta/lib/mfa"
@@ -218,8 +219,8 @@ func (o *OktaClient) AuthenticateProfileWithRegion(profileARN string, duration t
 	if region != "" {
 		log.Debugf("Using region: %s\n", region)
 		conf := &aws.Config{
-			Region:   aws.String(region),
-			Endpoint: aws.String(fmt.Sprintf("https://sts.%s.amazonaws.com", region)),
+			Region:              aws.String(region),
+			STSRegionalEndpoint: endpoints.RegionalSTSEndpoint,
 		}
 		samlSess = session.Must(session.NewSession(conf))
 	} else {