Register Device

curl -X POST "https://example.com/api/v1/sdk/push-devices/register" \  -H "x-distinct-id: string" \  -H "x-publishable-key: string" \  -H "x-client-bundle-id: string" \  -H "x-is-backgrounded: true" \  -H "x-is-debug-build: true" \  -H "x-observer-mode: true" \  -H "x-platform: string" \  -H "x-platform-flavor: native" \  -H "x-sdk: react-native" \  -H "x-sdk-version: string" \  -H "Content-Type: application/json" \  -d '{    "platform": "ios",    "provider": "fcm",    "platformToken": "string"  }'