Pass the installing user's id to the installation handler

source/src/Slackbot.Net.Endpoints/Configurations/IWorkspaceInstallationHandler.cs

@@ -16,4 +16,4 @@ public interface IWorkspaceInstallationHandler
     Task Uninstall(string teamId);
 }
 
-public record Workspace(string TeamId, string TeamName, string Token);
+public record Workspace(string TeamId, string TeamName, string Token, string InstallerUserId = null);

source/src/Slackbot.Net.Endpoints/Middlewares/SlackbotCodeTokenExchangeMiddleware.cs

@@ -37,7 +37,8 @@ await installationHandler.Install(new Workspace
             (
                 response.Team.Id,
                 response.Team.Name,
-                response.Access_Token
+                response.Access_Token,
+                response.Authed_User?.Id
             ));
 
             var stateTheAppSent = ctx.Request.Query["state"].FirstOrDefault();

source/src/Slackbot.Net.Endpoints/OAuth/OAuthClient.cs

@@ -44,7 +44,7 @@ internal record OAuthAccessV2Response(
 
     internal record Team(string Id, string Name);
 
-    internal record OAuthUser(string User_Id, string App_Home);
+    internal record OAuthUser(string Id);
 }
 
 internal static class HttpClientExtensions

source/test/Slackbot.Net.SlackClients.Http.Tests/DistributionRedirectTests.cs

@@ -24,6 +24,23 @@ public async Task WithoutState_TheWorkspaceIsInstalledAndTheSuccessPageUsedUntou
         Assert.Equal("/success?default=1", ctx.Response.Headers.Location.ToString());
     }
 
+    [Fact]
+    public async Task TheInstallingUserIsCarriedToTheInstallationHandler()
+    {
+        var (_, handler) = await Install(state: null, successRedirectUri: "/success",
+            """{"ok":true,"access_token":"xoxb-token","scope":"chat:write","team":{"id":"T1","name":"Team"},"app_id":"A1","authed_user":{"id":"U1"}}""");
+
+        Assert.Equal("U1", Assert.Single(handler.Installed).InstallerUserId);
+    }
+
+    [Fact]
+    public async Task WithoutAnAuthedUser_TheWorkspaceIsInstalledWithNoInstaller()
+    {
+        var (_, handler) = await Install(state: null, successRedirectUri: "/success");
+
+        Assert.Null(Assert.Single(handler.Installed).InstallerUserId);
+    }
+
     [Fact]
     public async Task StateRidesBackToTheSuccessPageAsAQueryParameter()
     {
@@ -45,7 +62,7 @@ public async Task StateIsNeverTheRedirectTarget_WhateverItHolds(string state)
     }
 
     private static async Task<(HttpContext Context, RecordingInstallationHandler Handler)> Install(
-        string state, string successRedirectUri)
+        string state, string successRedirectUri, string oauthAccessResponse = OauthAccessResponse)
     {
         var services = new ServiceCollection();
         services.AddLogging();
@@ -57,7 +74,7 @@ public async Task StateIsNeverTheRedirectTarget_WhateverItHolds(string state)
             o.SuccessRedirectUri = successRedirectUri;
         });
         services.ConfigureHttpClientDefaults(b =>
-            b.ConfigurePrimaryHttpMessageHandler(() => new StubHttpMessageHandler(OauthAccessResponse)));
+            b.ConfigurePrimaryHttpMessageHandler(() => new StubHttpMessageHandler(oauthAccessResponse)));
 
         await using var provider = services.BuildServiceProvider(new ServiceProviderOptions { ValidateScopes = true });
         await using var scope = provider.CreateAsyncScope();