Damn, only noticed you had an answer pending review after posting my own. Out of curiosity did you go with CURL, because auth0-PHP would not work? I confess PHP is not something I master so assumed that library would also apply to Laravel… but I might be missing something. In relation to the last error, how are you calling the Management API, it should be with an URL like https://{your_domain}.auth0.com/api/v2/.