Update documentation and add required permissions for Add-PnPMicrosoft365GroupToSite cmdlet (#5186)

Author: gautamdsheth

documentation/Add-PnPMicrosoft365GroupToSite.md

@@ -13,7 +13,9 @@ title: Add-PnPMicrosoft365GroupToSite
 
 **Required Permissions**
 
-* SharePoint: Access to the SharePoint Tenant Administration site
+* SharePoint: Access to the SharePoint Tenant Administration site + SharePoint site collection admin
+* SharePoint permissions: `Sites.FullControl.All` (application) or `AllSites.FullControl` (delegated)
+* Ensure the user/account is allowed to create Microsoft 365 Groups (tenant policy), has access to SharePoint admin site and is site collection admin of the site to be groupified.
 
 Groupifies a classic team site by creating a Microsoft 365 group for it and connecting the site with the newly created group.
 

src/Commands/Admin/AddMicrosoft365GroupToSite.cs

@@ -5,10 +5,14 @@
 using System.Management.Automation;
 using System;
 
+using PnP.PowerShell.Commands.Attributes;
+
 namespace PnP.PowerShell.Commands.Admin
 {
     [Cmdlet(VerbsCommon.Add, "PnPMicrosoft365GroupToSite")]
-    public class AddMicrosoft365GroupToSite: PnPSharePointOnlineAdminCmdlet
+    [RequiredApiApplicationPermissions("sharepoint/Sites.FullControl.All")]
+    [RequiredApiDelegatedPermissions("sharepoint/AllSites.FullControl")]
+    public class AddMicrosoft365GroupToSite : PnPSharePointOnlineAdminCmdlet
     {
         [Parameter(Mandatory = false)]
         public string Url;
@@ -38,7 +42,7 @@ public class AddMicrosoft365GroupToSite: PnPSharePointOnlineAdminCmdlet
         public string[] Owners;
 
         protected override void ExecuteCmdlet()
-        {            
+        {
             var groupifyInformation = new TeamSiteCollectionGroupifyInformation()
             {
                 Alias = Alias,