def configureIAMCredentials(self, AWSAccessKeyID, AWSSecretAccessKey, AWSSessionToken=""):
        """
        **Description**

        Used to configure/update the custom IAM credentials for Websocket SigV4 connection to 
        AWS IoT. Should be called before connect.

        **Syntax**

        .. code:: python

          myAWSIoTMQTTClient.configureIAMCredentials(obtainedAccessKeyID, obtainedSecretAccessKey, obtainedSessionToken)

        .. note::

          Hard-coding credentials into custom script is NOT recommended. Please use AWS Cognito identity service
          or other credential provider.

        **Parameters**

        *AWSAccessKeyID* - AWS Access Key Id from user-specific IAM credentials.

        *AWSSecretAccessKey* - AWS Secret Access Key from user-specific IAM credentials.

        *AWSSessionToken* - AWS Session Token for temporary authentication from STS.

        **Returns**

        None

        """
        iam_credentials_provider = IAMCredentialsProvider()
        iam_credentials_provider.set_access_key_id(AWSAccessKeyID)
        iam_credentials_provider.set_secret_access_key(AWSSecretAccessKey)
        iam_credentials_provider.set_session_token(AWSSessionToken)
        self._mqtt_core.configure_iam_credentials(iam_credentials_provider)
**Description**

        Used to configure/update the custom IAM credentials for Websocket SigV4 connection to 
        AWS IoT. Should be called before connect.

        **Syntax**

        .. code:: python

          myAWSIoTMQTTClient.configureIAMCredentials(obtainedAccessKeyID, obtainedSecretAccessKey, obtainedSessionToken)

        .. note::

          Hard-coding credentials into custom script is NOT recommended. Please use AWS Cognito identity service
          or other credential provider.

        **Parameters**

        *AWSAccessKeyID* - AWS Access Key Id from user-specific IAM credentials.

        *AWSSecretAccessKey* - AWS Secret Access Key from user-specific IAM credentials.

        *AWSSessionToken* - AWS Session Token for temporary authentication from STS.

        **Returns**

        None