diff --git a/google/internal/externalaccount/aws.go b/google/internal/externalaccount/aws.go
index fd3d682..906d1fe 100644
--- a/google/internal/externalaccount/aws.go
+++ b/google/internal/externalaccount/aws.go
@@ -26,20 +26,20 @@ type awsRequestSigner struct {
 }
 
 const (
-	// AWS Signature Version 4 signing algorithm identifier.
+// AWS Signature Version 4 signing algorithm identifier.
 	awsAlgorithm = "AWS4-HMAC-SHA256"
 
-	// The termination string for the AWS credential scope value as defined in
-	// https://docs.aws.amazon.com/general/latest/gr/sigv4-create-string-to-sign.html
+// The termination string for the AWS credential scope value as defined in
+// https://docs.aws.amazon.com/general/latest/gr/sigv4-create-string-to-sign.html
 	awsRequestType = "aws4_request"
 
-	// The AWS authorization header name for the security session token if available.
+// The AWS authorization header name for the security session token if available.
 	awsSecurityTokenHeader = "x-amz-security-token"
 
-	// The AWS authorization header name for the auto-generated date.
+// The AWS authorization header name for the auto-generated date.
 	awsDateHeader = "x-amz-date"
 
-	awsTimeFormatLong  = "20060102T150405Z"
+	awsTimeFormatLong = "20060102T150405Z"
 	awsTimeFormatShort = "20060102"
 )
 
@@ -203,14 +203,14 @@ func (rs *awsRequestSigner) generateAuthentication(req *http.Request, timestamp
 		serviceName = splitHost[0]
 	}
 
-	credentialScope := fmt.Sprintf("%s/%s/%s/%s", dateStamp, rs.RegionName, serviceName, awsRequestType)
+	credentialScope := fmt.Sprintf("%s/%s/%s/%s",dateStamp, rs.RegionName, serviceName, awsRequestType)
 
 	requestString, err := canonicalRequest(req, canonicalHeaderColumns, canonicalHeaderData)
 	if err != nil {
 		return "", err
 	}
 	requestHash, err := getSha256([]byte(requestString))
-	if err != nil {
+	if err != nil{
 		return "", err
 	}
 
@@ -221,7 +221,7 @@ func (rs *awsRequestSigner) generateAuthentication(req *http.Request, timestamp
 		dateStamp, rs.RegionName, serviceName, awsRequestType, stringToSign,
 	} {
 		signingKey, err = getHmacSha256(signingKey, []byte(signingInput))
-		if err != nil {
+		if err != nil{
 			return "", err
 		}
 	}