ali-cs

    String clientId;
    CognitoCachingCredentialsProvider credentialsProvider;
    AWSIotMqttManager mqttManager;
    String clientSecret = "<Your JWT Token>";

    public void init() {
       
        clientId = UUID.randomUUID().toString();

ali-cs

class CredentialIdentityAuthenticationProvider : AWSCognitoCredentialsProviderHelper {
    
    override func token() -> AWSTask<NSString> {
        //Write code to call your backend:
        //pass username/password to backend or some sort of token to authenticate user, if successful,
        //from backend call getOpenIdTokenForDeveloperIdentity with logins map containing "your.provider.name":"enduser.username"
        //return the identity id and token to client
        //You can use AWSTaskCompletionSource to do this asynchronously
        
        // Set the identity id and return the token

ali-cs

struct MqttConstants {
    static let endPoint          = "wss://a1pvqgswwsbwvy-ats.iot.eu-west-1.amazonaws.com/mqtt" // "wss:<IotEndpointATS>/mqtt
    
    static let IdentityPool      = "eu-west-1:9b8ca290-c620-452c-120c-77c6c442v6fd" // <IdentityPool>
    
    static let UserPool          = "<eu-west-1_bHTWQN1lI>" // <UserPool>
    
    static let kMQTTMKey         = "MQTTManager" // change to any key as your like :)
    
    static let mqttCognitoKey    = "cognito-idp.\(awsRegionString).amazonaws.com/\(UserPool)" // "cognito-idp.<REGION>.amazonaws.com/<UserPool>