in src/main/java/software/amazon/msk/auth/iam/internals/MSKCredentialProvider.java [167:173]
public AwsCredentials resolveCredentials() {
AwsCredentials credentials = loadCredentialsWithRetry();
if (credentials != null && shouldDebugCreds && log.isDebugEnabled()) {
logCallerIdentity(credentials);
}
return credentials;
}