function Invoke-StartDesignation {
    <#
    .SYNOPSIS
    This wraps the APIGateway/Lambda for scaling environments.  Starts all instances by Designation.

    .DESCRIPTION
    Will start all instances by Designation tag.

    .PARAMETER Fqdn
    Fully Qualified Domain Name of the API Gateway.  Each environment/account has a unique API Gateway endpoint.

    .PARAMETER Designation
    alk:designation tag to filter which instances to query. Case sensitive.

    .PARAMETER ApiGatewayKey
    Unique key for authenticating to the API Gateway.

    .EXAMPLE
    Invoke-StartDesignation -fqdn "vyq7hqcx55.execute-api.us-east-1.amazonaws.com" -designation "ci1" -apiGatewayKey "123456789"

    returns JSON:
    [
        {
            "IsExcluded": false,
            "IsApp": false,
            "IsMic": false,
            "IsWeb": true,
            "IsRunning": true,
            "IsStopped": false,
            "InstanceId": "i-0fa21749b4e4b81ea",
            "Designation": "ci1",
            "HostName": "web27425",
            "Environment": "dev",
            "Service": "orb"
        }
    ]
    .NOTES
    Dev FQDN : vyq7hqcx55.execute-api.us-east-1.amazonaws.com
    Staging FQDN : cox3133b67.execute-api.us-east-1.amazonaws.com
    Qa FQDN :
    #>
        [CmdletBinding()]

        Param (
            [Parameter(Mandatory = $true)]
            [string] $Fqdn,
            [Parameter(Mandatory = $true)]
            [string] $Designation,
            [Parameter(Mandatory = $true)]
            [string] $ApiGatewayKey
        )

        [System.Net.ServicePointManager]::SecurityProtocol = "Tls12"

        $jsonBody = '{"Designation":"' + $Designation + '"}'
        $response = Invoke-RestMethod -Uri "https://$Fqdn/Prod/StartDesignation" -Headers @{"x-api-key"="$ApiGatewayKey"} -Method POST -body $jsonBody -ContentType "application/json"

        return $response
    }