Report credential store name

src/Core/CredentialCacheStore.cs

@@ -23,6 +23,8 @@ public CredentialCacheStore(IGit git, string options)
 
         #region ICredentialStore
 
+        public string Name => "Git Credential Cache";
+
         public IList<string> GetAccounts(string service)
         {
             // Listing accounts is not supported by the credential-cache store so we just attempt to retrieve

src/Core/CredentialStore.cs

@@ -25,6 +25,15 @@ public CredentialStore(ICommandContext context)
 
         #region ICredentialStore
 
+        public string Name
+        {
+            get
+            {
+                EnsureBackingStore();
+                return _backingStore.Name;
+            }
+        }
+
         public IList<string> GetAccounts(string service)
         {
             EnsureBackingStore();

src/Core/Diagnostics/CredentialStoreDiagnostic.cs

@@ -13,7 +13,7 @@ public CredentialStoreDiagnostic(ICommandContext commandContext)
 
         protected override Task<bool> RunInternalAsync(StringBuilder log, IList<string> additionalFiles)
         {
-            log.AppendLine($"ICredentialStore instance is of type: {CommandContext.CredentialStore.GetType().Name}");
+            log.AppendLine($"Credential store is: {CommandContext.CredentialStore.Name}");
 
             // Create a service that is guaranteed to be unique
             string service = $"https://example.com/{Guid.NewGuid():N}";

src/Core/ICredentialStore.cs

@@ -7,6 +7,11 @@ namespace GitCredentialManager
     /// </summary>
     public interface ICredentialStore
     {
+        /// <summary>
+        /// Get the name of the credential store.
+        /// </summary>
+        string Name { get; }
+
         /// <summary>
         /// Get all accounts from the store for the given service.
         /// </summary>

src/Core/Interop/Linux/SecretServiceCollection.cs

@@ -37,6 +37,8 @@ public SecretServiceCollection(string @namespace)
 
         #region ICredentialStore
 
+        public string Name => "freedesktop.org Secret Service";
+
         public IList<string> GetAccounts(string service)
         {
             return Enumerate(service, null).Select(x => x.Account).Distinct().ToList();

src/Core/Interop/MacOS/MacOSKeychain.cs

@@ -31,6 +31,8 @@ public MacOSKeychain(string @namespace = null)
 
         #region ICredentialStore
 
+        public string Name => "macOS Keychain";
+
         public IList<string> GetAccounts(string service)
         {
             IntPtr query = IntPtr.Zero;

src/Core/Interop/Posix/GpgPassCredentialStore.cs

@@ -19,6 +19,8 @@ public GpgPassCredentialStore(IFileSystem fileSystem, IGpg gpg, string storeRoot
             _gpg = gpg;
         }
 
+        public override string Name => "GPG/Pass";
+
         protected override string CredentialFileExtension => ".gpg";
 
         private string GetGpgId(string credentialFullPath)

src/Core/Interop/Windows/DpapiCredentialStore.cs

@@ -14,6 +14,8 @@ public DpapiCredentialStore(IFileSystem fileSystem, string storeRoot, string @na
             PlatformUtils.EnsureWindows();
         }
 
+        public override string Name => "DPAPI";
+
         protected override bool TryDeserializeCredential(string path, out FileCredential credential)
         {
             string text;

src/Core/Interop/Windows/WindowsCredentialManager.cs

@@ -24,6 +24,8 @@ public WindowsCredentialManager(string @namespace = null)
             _namespace = @namespace;
         }
 
+        public string Name => "Windows Credential Manager";
+
         public IList<string> GetAccounts(string service)
         {
             return Enumerate(service, null).Select(x => x.UserName).Distinct().ToList();

src/Core/NullCredentialStore.cs

@@ -9,6 +9,8 @@ namespace GitCredentialManager;
 /// </summary>
 public class NullCredentialStore : ICredentialStore
 {
+    public string Name => "No-op";
+
     public IList<string> GetAccounts(string service) => Array.Empty<string>();
 
     public ICredential Get(string service, string account) => null;

src/Core/PlaintextCredentialStore.cs

@@ -23,6 +23,8 @@ public PlaintextCredentialStore(IFileSystem fileSystem, string storeRoot, string
         protected string Namespace { get; }
         protected virtual string CredentialFileExtension => ".credential";
 
+        public virtual string Name => "Plaintext";
+
         public IList<string> GetAccounts(string service)
         {
             return Enumerate(service, null).Select(x => x.Account).Distinct().ToList();

src/TestInfrastructure/Objects/TestCredentialStore.cs

@@ -14,6 +14,8 @@ public TestCredentialStore()
 
         #region ICredentialStore
 
+        public string Name => "Test Credential Store";
+
         public IList<string> GetAccounts(string service)
         {
             return Query(service, null).Select(x => x.Account).Distinct().ToList();