Laravel 5.7 - Spark API authentication session issues

Just going to preface this question by saying that I'm diving back into Laravel after a while of not using it, it appears there are a lot of changes, and the current project in question is using A LOT of the baked in "Laravel Ecosystem"... so I could be missing some context here.

The issue : After upgrading from Laravel 5.6 to 5.7, auth-guarded API routes are busting because of session expiry, even immediately after logging in (prompting logout).

The configuration :

/config/auth.php

'guards' => ['api' => ['driver' => 'spark']]

/routes/api.php

Route::group([
    'middleware' => 'auth:api'
], function () {
    // Routes in here are busting
}

/app/Providers/SparkServiceProvider.php

protected $usesApi = true; // yup

Additional info :

• The site uses the Socialite plugin for managing user authentication
• There are indeed spark_token's in the request
• Vue client making the calls, getting status 401 Unauthorized on the next page load after successfully authenticating via login form

Any ideas?

via Chebli Mohamed