Checks/Aws/Test-RdsInstanceDefaultAdmin.ps1

function Test-RdsInstanceDefaultAdmin {
    <#
    .SYNOPSIS
        RDS instance does not use the default master username (admin or postgres)

    .DESCRIPTION
        **RDS DB instances** are evaluated for use of a **custom administrator username**. The finding identifies instances or clusters where the admin user matches common defaults like `admin` or `postgres` (checked at the instance or cluster level).

    .PARAMETER Check
        CIEMCheck object containing check metadata.
    #>

    [CmdletBinding()]
    [OutputType([PSCustomObject[]])]
    param(
        [Parameter(Mandatory)]
        [CIEMCheck]$Check
    )

    $ErrorActionPreference = 'Stop'

    # TODO: Implement check logic based on Prowler check: rds_instance_default_admin

    [CIEMScanResult]::Create($Check, 'MANUAL', 'This check requires manual implementation. See Prowler check rds_instance_default_admin for reference.', 'N/A', 'rds Resources')
}