CreateModule.ps1

$ModuleScript = {
    $folders = @('functions', 'private', 'classes')

    ForEach ($folder in $folders)
    {
        $currentPath = $PSScriptRoot | Join-Path -ChildPath $folder

        If (Test-Path -Path $currentPath -PathType Container)
        {            
            $functions = Get-ChildItem -Path $currentPath -Filter '*.ps1'
            ForEach ($function in $functions)
            {                
                $encoding = [System.Text.Encoding]::UTF8
                $script = [System.IO.File]::ReadAllText($function.FullName, $encoding)
                . ([Scriptblock]::Create($script))
            }
        }
    }

    $splatItem = @{
        Path   = "$PSScriptRoot\functions"
        Filter = '*.ps1'
    }

    $ExportFunctions = Get-ChildItem @splatItem | Select-Object -ExpandProperty BaseName

    Export-ModuleMember -Function $ExportFunctions
}

Set-Content -Path .\FilesAPI.psm1 -Value $ModuleScript -Encoding UTF8