@Override
    protected AWSCognitoIdentityProviderAsync build(AwsAsyncClientParams params) {
        return new AWSCognitoIdentityProviderAsyncClient(params);
    }
Construct an asynchronous implementation of AWSCognitoIdentityProviderAsync using the current builder
configuration.

@param params
       Current builder configuration represented as a parameter object.
@return Fully configured implementation of AWSCognitoIdentityProviderAsync.
aws-java-sdk-cognitoidp/src/main/java/com/amazonaws/services/cognitoidp/AWSCognitoIdentityProviderAsyncClientBuilder.java