Truffle console: Accessing contract using an account other than owner

Question

I have the following contract:

pragma solidity >= 0.5.0 < 0.7.0;
 
contract SimpleContract {
  string  public name;
  address private owner;
  constructor() public {
     name = 'abs'; 
     owner = msg.sender; 
  }
  function getName() public view returns(string memory) {
      return (name);
   }
   modifier onlyOwner(){
      require(msg.sender == owner);
      _;
   }

   function changeName(string memory _name) public onlyOwner{
      name = _name;
   }
}

It works if I access through the owner's account:

truffle(development)> await SimpleContract.getName()
‘abs’

But I want to access the functions through a non-owner. I am trying the following:

truffle(development)> await SimpleContract.start({from: web3.acc1}) Thrown: TypeError: SimpleContract.start is not a function at evalmachine.:1:24

truffle(development)> await web3.eth.accounts[1].SimpleContract.getName(); Thrown: TypeError: Cannot read property 'SimpleContract' of undefined at evalmachine.:1:30 reentrancy:

Somebody please guide me how to access the contract using a non-owner.

Zulfi.

Answer 1

First you need to retrieve the accounts:

web3.eth.getAccounts().then(function(acc){ accounts = acc })

Then, for instance, if you try to call the changeName() function from a different address than the contract creator, transaction will revert:

await SimpleContract.changeName('Sergi', {from: accounts[2]})