Hotfix: handle laravel/passport v13 error messages

[Levivb]

Examples:

  {
    "error": "invalid_request",
    "error_description": "The request is missing a required parameter, includes an invalid parameter value, includes a parameter more than once, or is otherwise malformed.",
    "hint": "Check the `refresh_token` parameter"
  }

  {
    "error": "invalid_grant",
    "error_description": "The refresh token is invalid.",
    "hint": "Cannot decrypt the refresh token"
  }