Send email trough Send Grid API with powershell

SendGridEmail.ps1

function Send-GridEmail(){
	Param(
		[Parameter(Mandatory=$true)]
		[string]$From,
		[Parameter(Mandatory=$true)]
		[object[]]$To,
		[Parameter(Mandatory=$true)]
		[string]$Subject,
		[Parameter(Mandatory=$true)]
		[string]$Body,
		[Parameter(Mandatory=$false)]
		[object[]]$CopyTo
	)

	$SENDGRID_API_KEY = "****"
	$HEADERS = @{"Authorization" = "Bearer $SENDGRID_API_KEY"; "Content-Type" = "application/json"} 
	$BODY_OBJ = @{
		personalizations = @(
			@{
				to = $To
				cc = $CopyTo
			}
		)
		from = @{
			email = $From
		}
		subject = $Subject
		content = @(
			@{
				type = "text/plain"
				value = $Body
			}
		)
	}
	$JsonBody = ConvertTo-Json -InputObject $BODY_OBJ -Depth 10

	Invoke-RestMethod -Uri https://api.sendgrid.com/v3/mail/send -Method Post -Headers $HEADERS -Body $JsonBody
}