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CCS/CC3220SF-LAUNCHXL: Connecting to a third party MQTT cloud site issues

Dave Warner26
Intellectual 605 points
Part Number: CC3220SF-LAUNCHXL

Tool/software: Code Composer Studio

Hello:
In the recent past, I have had success in communicating with an AWS cloud site (based the AWS "Hello World" demo) - Now, I am trying to create a function in the 3220 firmware to connect to a 3rd party MQTT cloud site (I am currently using mosquitto_pub as a test tool to verify communication with their site - I have verified that I can publish messages to their site) - they have provided me with the following:

URL, Username, Password, Port, and publish topic
I simply would like to connect to their site and publish a messages to it.
The one thing I cannot find in any structure or API call is the option to add both a username and a password for the connection (in aws_mqtt_lib.h, the "MQTTConnectParams_t" structure has the option to enter a username, but not a password).
Does anybody know of examples or API documentation that would assist me in this?
Thanks in advance!
Dave