Get the NFTs indexes and uri, owned by the address
Returns the token's indexes owned by the address in the given contract
Returns the token's indexes owned by the address and NFT's uri, in the given contract
Returns array of NFT's struct in the given contracts
struct Nft {
contract_address - address of contract
tokenId - index of nft in contract
uri - uri of nft (can be a link to image or json)
}