public void select(final AuthScheme authScheme) {
        Args.notNull(authScheme, "Auth scheme");
        this.authScheme = authScheme;
        this.authOptions = null;
    }
Resets the auth state with {@link AuthScheme} and clears auth options.

@param authScheme auth scheme. May not be null.
httpclient5/src/main/java/org/apache/hc/client5/http/auth/AuthExchange.java