Create PowerShell script

I wish to create a PowerShell script which does the following;

Connects to Atera's API
Hardcodes the API key in the script
Prompts the user to enter customer name
Maps the customer name to the customer id
downloads and installs the atera agent and attaches to the client
needs to have error handling
needs to work with tls 1.2
needs to work on all PowerShell versions
needs to silently install

documentation: https://app.atera.com/apidocs

Thanks, Michael