User
Get or create user's referral code
Returns existing referral code or generates a new one if none exists.
The referral code can be used in two formats:
- For OG NFT holders:
https://gnosispay.com/oginvite?rcc=${referrerCode}&utm_source=referral&utm_campaign=${userId} - For non-OG NFT holders:
https://gnosispay.com/nonoginvite?rcc=${referrerCode}&utm_source=referral&utm_campaign=${userId}