Identifier not found or not unique? - ethereum

Question

I made a solidity contract and when I compiled it, I got the following error: 'DeclarationError: Identifier not found or not unique. --> Token.sol:20:59: | 20 | function balanceOf(address owner) public view returns(unit) { | ^^^^' What's up with that?
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.2;
contract Token {
mapping(address => uint) public balances;
mapping(address => mapping(address => uint)) public allowance;
uint public totalSupply = 1000000 * 10 ** 18;
string public name = "Mebium";
string public symbol = "MEB";
uint public decimals = 18;
event Transfer(address indexed from, address indexed to, uint value);
event Approval (address indexed owner, address indexed spender, uint value);
constructor() {
balances[msg.sender] = totalSupply;
}
function balanceOf(address owner) public view returns(unit) {
return balances[owmer];
}
function transfer(address to, uint value) public returns(bool) {
require(balanceOf(msg.sender) >= value, 'balance too low');
balances[to] += value;
balances[msg.sender] -= value;
emit Transfer(msg.sender, to, value);
return true;
}
function transferFrom(address from, address to, uint value) public returns(bool) {
require(balanceOf(from) >= value, 'balance too low');
require(allowance[from][msg.sender] >= value, 'allowance too low');
balances[to] += value;
balances[from] -= value;
emit Transfer(from, to, value);
return true;
}
function approve(address spender, uint value) public returns(bool) {
allowance[msg.sender][spender] = value;
emit Approval(msg.sender, spender, value);
return true;
}
}

Answer 1

It's caused by a typo in your code. The return type should be uint (unsigned integer), not unit.
You have one more typo in the function - should be owner, is owmer.
function balanceOf(address owner) public view returns(uint) {
return balances[owner];
}