As @ww has indicated, you need to use the API to get this information.
Depending what you’re looking for you’ll need to find the correct API endpoint. The only ‘VLAN’ settings that really exist in a Meraki network are the Layer 3 interface (assuming the VLAN has one). If you’re thinking Cisco Catalyst where you create and name a VLAN, then that doesn’t apply to the Meraki solution. On the MS all VLAN tags are passed (and you just add Layer 3 interfaces), unless you specifically block them, on the MX you do have to create a VLAN, but all you’re really doing is creating a Layer 3 interface.