Get funding methods

curl --request GET \
  --url https://api.useproxy.ai/v1/users/{userId}/funding \
  --header 'Api-Key: <api-key>'

{
  "object": "funding",
  "userId": "<string>",
  "methods": [
    {
      "type": "crypto",
      "network": "<string>",
      "chainId": 123,
      "address": "<string>"
    }
  ]
}