Merge pull request #2828 from KoenZomers/Issue2818

Added clearer error message when connecting using an expired clientsecret

Author: gautamdsheth

CHANGELOG.md

@@ -44,6 +44,7 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/).
 - Added `-ApplicationId` as alias for `-ClientId` in `Connect-PnPOnline` and `Request-PnPAccessToken` cmdlets. [#2805](https://github.com/pnp/powershell/pull/2805)
 - Added `-Connection` option to `Connect-PnPOnline` which allows of reusing an authenticated connection to connect to a different site [#2821](https://github.com/pnp/powershell/pull/2821)
 - Added `-UserAssignedManagedIdentityAzureResourceId` and `-UserAssignedManagedIdentityClientId` as alternatives to `-UserAssignedManagedIdentityObjectId` for `Connect-PnPOnline -ManagedIdentity` to provide an user managed identity to authenticate with. [#2813](https://github.com/pnp/powershell/pull/2813)
+- Added clearer error message when connecting using an expired client secret and trying to execute a command
 
 ### Changed
 

src/Commands/Base/PnPConnectedCmdlet.cs

@@ -1,4 +1,5 @@
 using System;
+using System.IO;
 using System.Linq;
 using System.Management.Automation;
 
@@ -69,6 +70,23 @@ protected override void ProcessRecord()
                         errorMessage = (rex.Error as PnP.Core.SharePointRestError).Message;
                         break;
 
+                    case System.Reflection.TargetInvocationException tex:
+                        Exception innermostException = tex;
+                        while (innermostException.InnerException != null) innermostException = innermostException.InnerException;
+
+                        if (innermostException is System.Net.WebException wex)
+                        {                            
+                            using(var streamReader = new StreamReader (wex.Response.GetResponseStream()))
+                            {
+                                errorMessage = $"{wex.Status}: {wex.Message} Response received: {streamReader.ReadToEnd()}";
+                            }
+                        }
+                        else
+                        {
+                            errorMessage = innermostException.Message;
+                        }
+                        break;
+
                     default:
                         errorMessage = ex.Message;
                         break;