iOS AppSync Multi Auth - API_KEY

AppSync_Client_API_KEY.swift

// WITH multi-auth
func initializeAppSync_API_Key() {
    do {
        // Reference the API_KEY auth mode setting in awsconfiguration.json
        let serviceConfigAPI_Key = try AWSAppSyncServiceConfig(forKey: "recipedemo_API_KEY")
        
        // useClientDatabasePrefix: true is telling the AppSync client to look for 'ClientDatabasePrefix' in awsconfiguration.json
        // why the cacheConfig? AppSync client uses a unique cache database for each auth type
        let cacheConfig = try AWSAppSyncCacheConfiguration(useClientDatabasePrefix: true,
                                appSyncServiceConfig: serviceConfigAPI_Key)
        // Initialize the AWS AppSync configuration to reference the "recipedemo_API_KEY" auth mode in awsconfiguration.json
        let appSyncConfig = try AWSAppSyncClientConfiguration(appSyncServiceConfig: serviceConfigAPI_Key, cacheConfiguration: cacheConfig)
        
        // Initialize the AWS AppSync client
        appSyncClient = try AWSAppSyncClient(appSyncConfig: appSyncConfig)
        
    } catch {
        print("Error initializing appsync client. \(error)")
}