You can request a user to sign and send a transaction on behalf of the connected account.
For that, you'll need to obtain an instance of the wallet object, construct the transaction you want to send and call the sendTransaction function on it.
constaccounts=awaitfuel.accounts();constaccount= accounts[0];consttransactionRequest=newScriptTransactionRequest({ gasLimit:50_000, gasPrice:1,});consttoAddress=Address.fromString(toAccount);constamount=bn.parseUnits("0.1");transactionRequest.addCoinOutput(toAddress, amount);constwallet=awaitfuel.getWallet(account);constresources=awaitwallet.getResourcesToSpend([[amount, NativeAssetId]]);transactionRequest.addResources(resources);constresponse=awaitwallet.sendTransaction(transactionRequest);// wait for transaction to be completedawaitresponse.wait();