diff --git a/preview/apitypes/apitypes.go b/preview/apitypes/apitypes.go
index 95dee72..e2144b6 100644
--- a/preview/apitypes/apitypes.go
+++ b/preview/apitypes/apitypes.go
@@ -33,6 +33,8 @@ const (
 	OptionTypeListString OptionType = "list(string)"
 )
 
+type WorkspaceOwner = types.WorkspaceOwner
+
 type PreviewOutput struct {
 	Output *Output           `json:"output"`
 	Diags  types.Diagnostics `json:"diags"`
diff --git a/preview/main.go b/preview/main.go
index c3666c6..8e14754 100644
--- a/preview/main.go
+++ b/preview/main.go
@@ -18,7 +18,6 @@ import (
 
 	"github.com/coder/preview"
 	"github.com/coder/preview/types"
-
 	"github.com/coder/parameters-playground/preview/apitypes"
 )
 
@@ -61,12 +60,17 @@ func tfpreview(this js.Value, p []js.Value) (output any) {
 		return err
 	}
 
+	owner, err := workspaceOwner(p[1])
+	if err != nil {
+		return err
+	}
+
 	handler := slog.NewJSONHandler(l, nil)
 	logger := slog.New(handler)
 
 	var parameters map[string]string
-	if len(p) >= 2 {
-		params, err := jsValueToStringMap(p[1])
+	if len(p) >= 3 {
+		params, err := jsValueToStringMap(p[2])
 		if err != nil {
 			logger.Error("Unable to convert second prameter into map[string]string", "err", err)
 		}
@@ -81,7 +85,7 @@ func tfpreview(this js.Value, p []js.Value) (output any) {
 		PlanJSONPath:    "",
 		PlanJSON:        nil,
 		ParameterValues: parameters,
-		Owner:           types.WorkspaceOwner{},
+		Owner:           owner,
 		Logger:          logger,
 	}, tf)
 
@@ -110,6 +114,16 @@ func fileTreeFS(value js.Value) (fs.FS, error) {
 	return afero.NewIOFS(mem), nil
 }
 
+func workspaceOwner(value js.Value) (apitypes.WorkspaceOwner, error) {
+	data := js.Global().Get("JSON").Call("stringify", value).String()
+	var owner apitypes.WorkspaceOwner
+	if err := json.Unmarshal([]byte(data), &owner); err != nil {
+		return apitypes.WorkspaceOwner(types.WorkspaceOwner{}), err
+	}
+
+	return owner, nil
+}
+
 func loadTree(mem afero.Fs, fileTree map[string]any, path ...string) {
 	dir := filepath.Join(path...)
 	err := mem.MkdirAll(dir, 0755)
diff --git a/public/build/preview.wasm b/public/build/preview.wasm
index 1ef37b0..fb523a5 100755
Binary files a/public/build/preview.wasm and b/public/build/preview.wasm differ
diff --git a/src/client/App.tsx b/src/client/App.tsx
index 47a3bf6..967c3e8 100644
--- a/src/client/App.tsx
+++ b/src/client/App.tsx
@@ -31,9 +31,11 @@ import {
 } from "@/client/components/Tooltip";
 import { rpc } from "@/utils/rpc";
 import { useLoaderData, type LoaderFunctionArgs } from "react-router";
+import type {WorkspaceOwner} from "@/gen/types.ts";
 
 type GoPreviewDef = (
 	v: Record<string, string>,
+	owner: WorkspaceOwner,
 	params: Record<string, string>,
 ) => Promise<string>;
 
diff --git a/src/client/Preview.tsx b/src/client/Preview.tsx
index d6e2e8d..96af017 100644
--- a/src/client/Preview.tsx
+++ b/src/client/Preview.tsx
@@ -14,7 +14,7 @@ import {
 } from "@/client/diagnostics";
 import { useDebouncedValue } from "@/client/hooks/debounce";
 import { useStore } from "@/client/store";
-import type { Parameter, ParserLog, PreviewOutput } from "@/gen/types";
+import type {Parameter, ParserLog, PreviewOutput} from "@/gen/types";
 import { cn } from "@/utils/cn";
 import ReactJsonView from "@microlink/react-json-view";
 import * as Dialog from "@radix-ui/react-dialog";
@@ -83,6 +83,16 @@ export const Preview: FC = () => {
 					{
 						"main.tf": debouncedCode,
 					},
+					{
+						id: "8d36e355-e775-4c49-9b8d-ac042ed50440",
+						name: "coder",
+						full_name: "Coder",
+						email: "coder@coder.com",
+						ssh_public_key: "",
+						groups: ["Everyone"],
+						login_type: "password",
+						rbac_roles: [{name:"member", org_id:""}, {name:"organization-member",org_id:"09942665-ba1b-4661-be9f-36bf9f738c83"}]
+					},
 					$form,
 				);
 
diff --git a/src/gen/types.ts b/src/gen/types.ts
index 762e2e3..4e57ba8 100644
--- a/src/gen/types.ts
+++ b/src/gen/types.ts
@@ -134,4 +134,22 @@ export interface Range {
     End: Pos;
 }
 
+// From apitypes/apitypes.go
+export interface WorkspaceOwner {
+    id: string;
+    name: string;
+    full_name: string;
+    email: string;
+    ssh_public_key: string;
+    groups: string[];
+    login_type: string;
+    rbac_roles: WorkspaceOwnerRBACRole[];
+}
+
+// From types/owner.go
+export interface WorkspaceOwnerRBACRole {
+    name: string;
+    org_id: string;
+}
+