Register Stablepay ID

curl --request POST \
  --url https://api.stablepay.ai/id/register \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '{
  "username": "<string>",
  "wallet_address": "<string>",
  "country": "<string>",
  "issuer": "Valr"
}'

{
  "status": "Successful",
  "username": "<string>",
  "country": "<string>",
  "issuer": "Valr",
  "stablepay_token_account": "<string>"
}