rpc/auth/email: use region from builder response

Author: patrislav

rpc/auth/email/provider.go

@@ -119,6 +119,7 @@ func (p *AuthProvider) InitiateAuth(
 	if tpl.SesConfig != nil {
 		msg.SourceARN = tpl.SesConfig.SourceARN
 		msg.AccessRoleARN = tpl.SesConfig.AccessRoleARN
+		msg.Region = tpl.SesConfig.Region
 	}
 
 	if err := p.Sender.Send(ctx, msg); err != nil {

rpc/auth/email/sender.go

@@ -12,6 +12,7 @@ type Message struct {
 	Source        string
 	SourceARN     string
 	AccessRoleARN string
+	Region        string
 }
 
 type Sender interface {

rpc/auth/email/ses.go

@@ -36,7 +36,9 @@ func (s *sesSender) Send(ctx context.Context, msg *Message) error {
 		creds := stscreds.NewAssumeRoleProvider(stsClient, accessRoleARN)
 		awsCfg.Credentials = aws.NewCredentialsCache(creds)
 	}
-	if s.cfg.Region != "" {
+	if msg.Region != "" {
+		awsCfg.Region = msg.Region
+	} else if s.cfg.Region != "" {
 		awsCfg.Region = s.cfg.Region
 	}