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

        Used to configure/update the custom IAM credentials for the underneath AWS IoT MQTT Client 
        for Websocket SigV4 connection to AWS IoT. Should be called before connect. This is a public
        facing API inherited by application level public clients.

        **Syntax**

        .. code:: python

          myShadowClient.clearLastWill(obtainedAccessKeyID, obtainedSecretAccessKey, obtainedSessionToken)
          myJobsClient.clearLastWill(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

        """
        # AWSIoTMQTTClient.configureIAMCredentials
        self._AWSIoTMQTTClient.configureIAMCredentials(AWSAccessKeyID, AWSSecretAccessKey, AWSSTSToken)
**Description**

        Used to configure/update the custom IAM credentials for the underneath AWS IoT MQTT Client 
        for Websocket SigV4 connection to AWS IoT. Should be called before connect. This is a public
        facing API inherited by application level public clients.

        **Syntax**

        .. code:: python

          myShadowClient.clearLastWill(obtainedAccessKeyID, obtainedSecretAccessKey, obtainedSessionToken)
          myJobsClient.clearLastWill(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