Get assets held by a user

curl --request GET \
  --url https://api.gte.xyz/v1/users/{user_address}/assets

{
  "assets": [
    {
      "address": "<string>",
      "decimals": 123,
      "name": "<string>",
      "symbol": "<string>",
      "creator": "<string>",
      "totalSupply": 123,
      "mediaUri": "<string>",
      "balance": 123
    }
  ],
  "totalUsdBalance": 123,
  "total": 123
}