Check if field exists in a SharePoint list

Check-ColumnExists.ps1

function Check-ColumnExists()
{
    param(
        [Parameter(Mandatory=$true)][string]$url,
        [Parameter(Mandatory=$true)][System.Net.NetworkCredential]$credentials,
        [Parameter(Mandatory=$true)][string]$listName,
        [Parameter(Mandatory=$true)][string]$fieldName
    )
    begin{
            try
            {
                #get Client Object
                $context = New-Object Microsoft.SharePoint.Client.ClientContext($url)
                $context.Credentials = $credentials
                $web = $context.Web 
                $context.Load($web) 
                $context.ExecuteQuery()

                #Retrieve List
                $List = $Context.Web.Lists.GetByTitle($listName)
                $context.Load($List)
                $context.ExecuteQuery()

                #Retrive Fields
                $Fields = $List.Fields
                $context.Load($Fields)
                $context.ExecuteQuery()

                
            }
            catch
            {
                Write-Host ("Error while getting context. Error -->> " + $_.Exception.Message) -ForegroundColor Red
            }
        }
    process{
            try
            {
                $Field = $List.Fields | where{$_.Title -eq $fieldName}
                if($Field)
                {
                    #Execute if Field exists
                    Write-Host "Field " $fieldName " exists" -ForegroundColor Green
                    return $true
                }
                else
                {
                    #Execute if Field does not exists
                    Write-Host "Field " $fieldName " does not exists" -ForegroundColor Green
                    return $false
                }
            }
            catch
            {
                Write-Host ("Error while checking for field. Error -->> " + $_.Exception.Message) -ForegroundColor Red
            }
        }
        end{
     $context.Dispose()
    }
}