Hi inebunit,
When using the Deep Index API from your Dashboard you need to provide the master key to authorize the calls. See the Deep Index docs here:
https://docs.moralis.io/moralis-server/deep-index-api
You can also use the Convenience Functions plugs to get token and NFT balances for any address
https://docs.moralis.io/moralis-sdk/crypto-common-functions
In the future weāll have some sort of built in way to get token price data, but for now the simplest way is to use the CoinGecko API. See their docs here:
https://www.coingecko.com/api/documentations/v3
Hope that helps.