Install social plugin that has it's own SHORTCODE and add it to Theme Options - Socials - 'Login via Social network' field. We recommend: Wordpress Social Login
Proverbs 3:5-6 New King James Version (NKJV)
5 Trust in the Lord with all your heart,
And lean not on your own understanding;
6 In all your ways acknowledge Him,
And He shall [a]direct your paths.