public Executor clearAuth() {
        final CredentialsStore credentialsStoreSnapshot = credentialsStore;
        if (credentialsStoreSnapshot != null) {
            credentialsStoreSnapshot.clear();
        }
        return this;
    }
@return this instance.
@deprecated Use {@link #auth(HttpHost, String, char[])}.
httpclient5-fluent/src/main/java/org/apache/hc/client5/http/fluent/Executor.java