Update user subscription topic
Method: PUT
URL: https://api.courier.com/users/example_user_id/preferences/FW0YU64P4TMYKMMHH67D6FENX8VS
JSON
// Sample User Preference Input
{
"topic": { "status": "OPTED_OUT", "has_custom_routing": true, "custom_routing": ["sms", "push"] }
}