Setup your application's code

// composer.json

"minimum-stability": "dev",
"prefer-stable": true,
"require": {
    // ...
    "guzzlehttp/psr7": "^1.4",
    "php-http/curl-client": "^1.7",
    "php-http/httplug-bundle": "^1.7",
    "hwi/oauth-bundle": ">=0.6",
},

Add the following lines to your base code

<script src="https://cdn.auth0.com/js/lock/11.3.0/lock.min.js"></script>
<script>
var lock = new Auth0Lock('YOUR_CLIENT_ID', 'YOUR_AUTH0_DOMAIN');

function signin() {
  lock.show({
      callbackURL: 'http://localhost:CHANGE-TO-YOUR-PORT/callback'
    , responseType: 'code'
    , authParams: {
      scope: 'openid name email' //Details: https:///scopes
    }
  });
}
</script>

<button onclick="signin()">Login</button>

Create an Application in Auth0 dashboard 

Create a Social Instagram Connection under Connections / Social section