connector/src/main/java/org/jboss/as/connector/security/ElytronSubjectFactory.java
private void addPrivateCredential(final Subject subject, final Object credential) {
        if (!WildFlySecurityManager.isChecking()) {
            subject.getPrivateCredentials().add(credential);
        }
        else {
            AccessController.doPrivileged((PrivilegedAction<Void>) () -> {
                subject.getPrivateCredentials().add(credential);
                return null;
            });
        }
    }
private void addPrivateCredential(final Subject subject, final Object credential) {
        if (!WildFlySecurityManager.isChecking()) {
            subject.getPrivateCredentials().add(credential);
        }
        else {
            AccessController.doPrivileged((PrivilegedAction<Void>) () -> {
                subject.getPrivateCredentials().add(credential);
                return null;
            });
        }
    }
Add the specified credential to the subject's private credentials set.

@param subject the {@link Subject} to add the credential to.
@param credential a reference to the credential.