DefaultManager().saveValueInDefault(value: "TestValue", using: "TestKey")
let valueFetch:String = DefaultManager().getValue("TestKey") ?? ""

private let managerPlist = plistManager(named: "userDetails")

managerPlist?.saveDatatoPlist(value: "TestString Value", using: "TestKey")
let stringValue :String = managerPlist?.getDictionary(key: "TestKey") ?? ""

let passWordString = textPassword?.text?.data(using: .utf8, allowLossyConversion: false) ?? Data()
let passwordStatus = KeyChainManager()?.save(key: "com.appBundleID.password", data: passWordString)

//Retrive data

if let receivedData = KeyChainManager()?.load(key: "com.appBundleID.password") {
    let data = String(decoding: receivedData, as: UTF8.self)
    print("result: ", data)
}

let userNameString = textName?.text?.data(using: .utf8, allowLossyConversion: false) ?? Data()
let emailStatus = KeyChainManager()?.save(key: "com.appBundleID.email", data: userNameString)

//Retrive data

if let data = KeyChainManager()?.load(key: "com.appBundleID.email") {
    let data = String(decoding: data, as: UTF8.self)
    print("result: ", data)
}

Replace "com.appBundleID" with your project bundleID for KeyChain integration
Define the dataType in which you want to fetch the value and that’s the way you can get the stored value.