Setup your application's code

// composer.json

"require": {
    ...
    "hwi/oauth-bundle": "^0.5.3",
},

Add the following lines to your base code

<script src="https://cdn.auth0.com/js/lock/10.19/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