Get a customer
$customer = Get-PCCustomer -tenantid '<tenant id GUID>'
Get a role
$role = Get-PCCustomerRole -tenantid $customer.id | Where-Object name -Contains '<role name>'
Get a User
$user = Get-PCCustomerUser -tenantid $customer.id -userid '<user id guid>'
Add a User to a Role
$customerRoleMember = [DirectoryRoleMember]::new()
$customerRoleMember.id = $user.id
Add-PCCustomerRoleMember -tenantid $customer.id -roleid $role.id -customerrolemember $customerRoleMember