Nit: Small changes

Author: Siddharth Yagnik

src/main/java/software/amazon/msk/auth/iam/internals/MSKCredentialProvider.java

@@ -166,9 +166,8 @@ protected AwsCredentialsProvider getDefaultProvider() {
 
     @Override
     public AwsCredentials resolveCredentials() {
-        log.error("RESOLVING CREDENTIALS!!");
         AwsCredentials credentials = loadCredentialsWithRetry();
-        if (credentials != null && shouldDebugCreds) {
+        if (credentials != null && shouldDebugCreds && log.isDebugEnabled()) {
             logCallerIdentity(credentials);
         }
         return  credentials;
@@ -219,7 +218,7 @@ private void logCallerIdentity(AwsCredentials credentials) {
         try {
             StsClient stsClient = getStsClientForDebuggingCreds(credentials);
             GetCallerIdentityResponse response = stsClient.getCallerIdentity();
-            log.error("The identity of the credentials is {}", response.toString());
+            log.debug("The identity of the credentials is {}", response.toString());
         } catch (Exception e) {
             //If we run into an exception logging the caller identity, we should log the exception but
             //continue running.
@@ -362,7 +361,6 @@ StsAssumeRoleCredentialsProvider createSTSRoleCredentialProvider(
                 .build();
             return StsAssumeRoleCredentialsProvider.builder()
                 .stsClient(stsClient)
-                .asyncCredentialUpdateEnabled(true)
                 .refreshRequest(roleRequest)
                 .asyncCredentialUpdateEnabled(true)
                 .build();
@@ -381,7 +379,6 @@ StsAssumeRoleCredentialsProvider createSTSRoleCredentialProvider(
                 .build();
             return StsAssumeRoleCredentialsProvider.builder()
                 .stsClient(stsClient)
-                .asyncCredentialUpdateEnabled(true)
                 .refreshRequest(roleRequest)
                 .asyncCredentialUpdateEnabled(true)
                 .build();
@@ -399,7 +396,6 @@ StsAssumeRoleCredentialsProvider createSTSRoleCredentialProvider(
                 .build();
             return StsAssumeRoleCredentialsProvider.builder()
                 .stsClient(getStsClientBuilder(Region.of(stsRegion)).build())
-                .asyncCredentialUpdateEnabled(true)
                 .refreshRequest(roleRequest)
                 .asyncCredentialUpdateEnabled(true)
                 .build();