POST /v1/apps/{{app_id}}/users/{{user_id}}/devices/{{device_id}} HTTP/1.1
Host: https://api.ravenapp.dev
Authorization: AuthKey {{secret_key}}
Content-Type: application/json
"fcm_token" : "qweKu7bdTZumJpzxUqqpxe:APA91bE9FSScPK_kENPpBAj0URYDo4z0tE6aOrBtpgaA1I1OC7GBes1lR71EWRhavLGMzDMKPPLkUoqtvPHzCgq-8ObU4AOJjbPdpkyRWqc8mqrUV2EkvsziLZvFccwtyI7-lQQhSJDe"