Unable to configure the codecept conf.js for multiple browser

I have used below in my config file -

exports.config = {
output: “./output”,
multiple: {
basic: {
// run all tests in chrome and firefox
browsers: [“chrome”, “firefox”],
grep: ‘@CSBrowseHA
},
},
helpers: {
WebDriverIO: {
cchost: “hub”,
url: “http://localhost”,
browser: ‘chrome’,
desiredCapabilities: {
chromeOptions: {
prefs: {
safebrowsing: {
enabled: true
}
}
}
},
restart: false,
keepCookies: true,
timeouts: {
script: 60000,
pageload: 10000,
smartWait: 5000
},
windowSize: “maximize”
},