mqtt_simple connect to AWS

I have an AWS account and I am comfortable with the AWS IOT operation in general. I have used it in the past. I am trying to get the sample mqtt_simple to connect to AWS IOT and be able to send packets and receive packets to the nRF9160dk board.

 I am not sure how to set up mqtt_simple parameters? I have created a thing and certificates. I have named the thing "nrf-IMEI" as recommended so it has the board ID in it. All I want to do is to be able to publish a packet to a topic on my AWS account and receive a packet from a topic in my AWS account. I have done this several times in the past with other systems so I am comfortable with AWS IOT operations and formats. I just do not understand how to get mqtt_simple to publish from my board to AWS and subscribe to messages from AWS.

Is this the correct program to use. It seems like all the pieces are there I just do not know how to use them.

I appreciate any help you can give, This is an essential requirement of our production system. right now we are using the pre-production system with a modified version of asset_tracker to send sensor data to the nRF Connect site. We need to be able to send sensor data to our AWS site.

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