curl -X POST "https://api.descope.com/v1/auth/magiclink/signup/email" \
  -H "Authorization: Bearer <token>" \
  -H "Content-Type: application/json" \
  -d '{
    "email": "string",
    "loginId": "string",
    "user": {
      "loginId": "string",
      "name": "string",
      "phone": "string",
      "email": "string",
      "givenName": "string",
      "middleName": "string",
      "familyName": "string"
    },
    "redirectUrl": "string",
    "providerId": "string",
    "loginOptions": {
      "customClaims": {},
      "templateOptions": {
        "property1": "string",
        "property2": "string"
      },
      "locale": "string",
      "pkceChallenge": "string"
    }
  }'