SPOConnectWrapper.ps1

[CmdletBinding(DefaultParameterSetName = "Interactive")]
param (
    [Parameter(Mandatory, ParameterSetName = "UserPassword")]
    [Parameter(Mandatory, ParameterSetName = "Interactive")]
    [Parameter(Mandatory, ParameterSetName = "AppIDCertificate")]
    [string] $Url,

    [Parameter(Mandatory, ParameterSetName = "UserPassword")]
    [pscredential] $Credentials,

    [Parameter(Mandatory, ParameterSetName = "AppIDCertificate")]
    [string] $ClientID,

    [Parameter(Mandatory, ParameterSetName = "AppIDCertificate")]
    [string] $CertificatePath,

    [Parameter(Mandatory, ParameterSetName = "AppIDCertificate")]
    [securestring] $CertificatePassword
)

Write-Verbose -Message ("Trying to connect with method " + $PSCmdlet.ParameterSetName)
Write-Verbose -Message ("Connect to " + $Url)

switch ($PSCmdlet.ParameterSetName)
{
    "Interactive"
    {
        Connect-PnPOnline -Url $Url -Interactive
    }

    "UserPassword"
    {
        Connect-PnPOnline -Url $Url -Credentials $Credentials
    }

    "AppIDCertificate"
    {
        Connect-PnPOnline -Url $Url -ClientId $ClientID -CertificatePath $CertificatePath -CertificatePassword $CertificatePassword
    }
}