Sharing account details across iOS app and WatchOS 7 app - ios

Question

I am looking for a way to share account credentials like userID and accessToken between my iOS app and my WatchOS app. As i understand i can use the WatchConnectivity framework but that does not seem reliable. For example if my iOS app is killed i could not find a way to force wake the app to fetch the data.
The other think that i tried was keychain sharing which also does not seem to work and gives
keyStore.retrieve SecItemCopyMatching error -25300
error
Below is the code that i am using, which i got from this tutorial.
class KeyStore {
let account = "accessToken"
let group = "[TeamID].[BundleID]" //Setup same as in keychain sharing options in capabilities
func store(token : String) {
let data = token.data(using: .utf8)!
let addquery: [String: Any] = [kSecClass as String: kSecClassGenericPassword as String,
kSecAttrAccount as String: account,
kSecValueData as String: data,
kSecAttrSynchronizable as String : kCFBooleanTrue!,
kSecAttrAccessGroup as String : group
]
SecItemDelete(addquery as CFDictionary)
let status : OSStatus = SecItemAdd(addquery as CFDictionary, nil)
guard status == errSecSuccess else {
os_log("store: whoops")
return
}
}
func clear() {
let addquery: [String: Any] = [kSecClass as String: kSecClassGenericPassword as String,
kSecAttrAccount as String: account,
kSecAttrSynchronizable as String : kCFBooleanTrue!,
kSecAttrAccessGroup as String : group
]
SecItemDelete(addquery as CFDictionary)
}
func retrieve() -> String? {
let getquery: [String: Any] = [kSecClass as String: kSecClassGenericPassword,
kSecAttrAccount as String: account,
kSecReturnData as String: kCFBooleanTrue!,
kSecMatchLimit as String : kSecMatchLimitOne,
kSecAttrSynchronizable as String : kCFBooleanTrue!,
kSecAttrAccessGroup as String : group
]
var item: CFTypeRef?
let status = SecItemCopyMatching(getquery as CFDictionary, &item)
guard status == errSecSuccess else {
os_log("keyStore.retrieve SecItemCopyMatching error \(status)")
return nil
}
guard let data = item as? Data? else {
os_log("keyStore.retrieve not data")
return nil
}
return String(data: data!, encoding: String.Encoding.utf8)
}
func getAllKeychainItems() throws {
let classes = [kSecClassGenericPassword as String, // Generic password items
kSecClassInternetPassword as String, // Internet password items
kSecClassCertificate as String, // Certificate items
kSecClassKey as String, // Cryptographic key items
kSecClassIdentity as String,
kSecAttrAccount as String] // Identity items
classes.forEach { secClass in
let items = getAllKeyChainItemsOfClass( secClass )
NSLog(items.description)
}
}
func getAllKeyChainItemsOfClass(_ secClass: String) -> [String: AnyObject] {
let query: [String: Any] = [
kSecClass as String : secClass,
kSecReturnData as String : true,
kSecReturnAttributes as String : true,
kSecReturnRef as String : true,
kSecMatchLimit as String: kSecMatchLimitAll
]
var result: AnyObject?
let lastResultCode = withUnsafeMutablePointer(to: &result) {
SecItemCopyMatching(query as CFDictionary, UnsafeMutablePointer($0))
}
var values = [String: AnyObject]()
if lastResultCode == noErr {
let array = result as? Array<Dictionary<String, Any>>
for item in array! {
if let key = item[kSecAttrAccount as String] as? String,
let value = item[kSecValueData as String] as? Data {
values[key] = String(data: value, encoding:.utf8) as AnyObject?
}
else if let key = item[kSecAttrLabel as String] as? String,
let value = item[kSecValueRef as String] {
values[key] = value as AnyObject
}
}
}
return values
}
}
Any references that could help me share login credentials even when the app is killed would really help