I managed to get call() working.
I'm not using Metamask - just the ganache GUI accounts.
However now Im getting following error:
UnhandledPromiseRejectionWarning: Error: Returned error: VM Exception while processing transaction: revert ERC20: transfer amount exceeds allowance
See full code below:
==================================================================
const Web3 = require('web3');
const UpToken = require('../build/contracts/UpToken.json');
if (typeof web3 !== 'undefined') {
var web3 = new Web3(web3.currentProvider)
} else {
var web3 = new Web3(new Web3.providers.HttpProvider('http://localhost:7545'))
}
const init = async () => {
let accounts = await web3.eth.getAccounts();
web3.eth.defaultAccount = accounts[0];
const id = await web3.eth.net.getId();
const deployedNetwork = UpToken.networks[id];
const contrato = new web3.eth.Contract(
UpToken.abi,
deployedNetwork.address,
{from: '0x23c63608dDbB5EE00A0628196020CA353aE8351d', // default from address
gas: 6721975,
gasPrice: '20000000000'} // default gas price in wei, 20 gwei in this case
);
await contrato.methods.approve('0x05d62294C5809800644D28939ea0177B432187df', 101).call();
await contrato.methods.transferFrom('0x23c63608dDbB5EE00A0628196020CA353aE8351d', '0xe0788Ce42F19ae49A7817b865Ac8eed74D2D343A', 102).call();
}

init();