Spl token not getting minted using spl js library - solana

Question

Here's my code i'm trying to mint spl token using spl js library:
(async () => {
const connection = new web3.Connection(web3.clusterApiUrl("devnet"));
let secretKey = Uint8Array.from([
186, 104, 237, 47, 123, 227, 2, 226, 150, 7, 169, 40, 252, 67, 161, 86, 198,....
183, 130, 31, 174, 135, 153, 46, 227, 154, 125, 20, 79, 209,
]);
const myKeypair = web3.Keypair.fromSecretKey(secretKey);
console.log(myKeypair.publicKey);
mint = await splToken.createMint(
connection,
myKeypair,
myKeypair.publicKey,
null,
9,
splToken.TOKEN_PROGRAM_ID
);
console.log("mint:"+mint);
})();
This is the error im getting:
solana/node_modules/#solana/web3.js/lib/index.cjs.js:1791
const key = signer.publicKey.toString();
^
TypeError: Cannot read properties of undefined (reading 'toString')
at Transaction.sign solana/node_modules/#solana/web3.js/lib/index.cjs.js:1791:36)
at Connection.sendTransaction solana/node_modules/#solana/web3.js/lib/index.cjs.js:9676:21)

Answer 1

those are the parameters for createMint()
#param connection — Connection to use
#param payer — Payer of the transaction and initialization fees
#param mintAuthority — Account or multisig that will control minting
#param freezeAuthority — Optional account or multisig that can freeze token accounts
#param decimals — Location of the decimal place
#param keypair — Optional keypair, defaulting to a new random one
Last one type is Keypair. but you are passing splToken.TOKEN_PROGRAM_ID which is PublicKey. you need to create another keypair for the last arg