diff --git a/packages/data-center/src/datacenter.ts b/packages/data-center/src/datacenter.ts
index 76499b11e..1221b114f 100644
--- a/packages/data-center/src/datacenter.ts
+++ b/packages/data-center/src/datacenter.ts
@@ -384,6 +384,20 @@ export class DataCenter {
     return (await blobStorage?.set(blob)) || '';
   }
 
+  /**
+   * get members of a workspace
+   * @param workspaceId
+   */
+  async getMembers(workspaceId: string) {
+    const workspaceInfo = this._workspaceUnitCollection.find(workspaceId);
+    assert(workspaceInfo, 'Workspace not found');
+    const provider = this.providerMap.get(workspaceInfo.provider);
+    if (provider) {
+      return await provider.getWorkspaceMembers(workspaceId);
+    }
+    return [];
+  }
+
   onMessage(cb: (message: Message) => void) {
     return this._messageCenter.onMessage(cb);
   }
diff --git a/packages/data-center/src/provider/affine/affine.ts b/packages/data-center/src/provider/affine/affine.ts
index 2b1c73ae5..3b0161743 100644
--- a/packages/data-center/src/provider/affine/affine.ts
+++ b/packages/data-center/src/provider/affine/affine.ts
@@ -12,11 +12,11 @@ import { storage } from './storage.js';
 import assert from 'assert';
 import { WebsocketProvider } from './sync.js';
 // import { IndexedDBProvider } from '../local/indexeddb';
-import { getApis } from './apis/index.js';
+import { getApis, Member } from './apis/index.js';
 import type { Apis, WorkspaceDetail, Callback } from './apis';
 import { setDefaultAvatar } from '../utils.js';
 import { MessageCode } from '../../message';
-import { blob } from 'stream/consumers';
+import { token } from './apis/token.js';
 
 export interface AffineProviderConstructorParams
   extends ProviderConstructorParams {
@@ -215,6 +215,7 @@ export class AffineProvider extends BaseProvider {
   public override async getUserInfo(): Promise<User | undefined> {
     await this.init();
     const user = this._apis.token.user;
+    await this.init;
     return user
       ? {
           id: user.id,
@@ -361,4 +362,13 @@ export class AffineProvider extends BaseProvider {
     });
     return to;
   }
+
+  public override async logout(): Promise<void> {
+    token.clear();
+    storage.removeItem('token');
+  }
+
+  public override async getWorkspaceMembers(id: string) {
+    return this._apis.getWorkspaceMembers({ id });
+  }
 }
diff --git a/packages/data-center/src/provider/affine/apis/token.ts b/packages/data-center/src/provider/affine/apis/token.ts
index 62da8def9..4df48b307 100644
--- a/packages/data-center/src/provider/affine/apis/token.ts
+++ b/packages/data-center/src/provider/affine/apis/token.ts
@@ -140,6 +140,10 @@ class Token {
       this.callbacks.splice(index, 1);
     }
   }
+
+  clear() {
+    this._setToken();
+  }
 }
 
 export const token = new Token();
diff --git a/packages/data-center/src/provider/base.ts b/packages/data-center/src/provider/base.ts
index 6542b279f..17834abf3 100644
--- a/packages/data-center/src/provider/base.ts
+++ b/packages/data-center/src/provider/base.ts
@@ -3,6 +3,7 @@ import { MessageCenter } from '../message';
 import { Logger, User } from '../types';
 import type { WorkspaceUnitCollectionScope } from '../workspace-unit-collection';
 import type { WorkspaceUnitCtorParams } from '../workspace-unit';
+import { Member } from './affine/apis';
 
 const defaultLogger = () => {
   return;
@@ -213,4 +214,14 @@ export class BaseProvider {
     from;
     return to;
   }
+
+  /**
+   * get workspace members
+   * @param {string} workspaceId
+   * @returns
+   */
+  public getWorkspaceMembers(workspaceId: string): Promise<Member[]> {
+    workspaceId;
+    return Promise.resolve([]);
+  }
 }
diff --git a/packages/data-center/src/workspace-unit-collection.spec.ts b/packages/data-center/src/workspace-unit-collection.spec.ts
index 06eee95bd..f010c31d1 100644
--- a/packages/data-center/src/workspace-unit-collection.spec.ts
+++ b/packages/data-center/src/workspace-unit-collection.spec.ts
@@ -11,7 +11,7 @@ test.describe.serial('workspace meta collection observable', () => {
     workspaceUnitCollection.once(
       'change',
       (event: WorkspaceUnitCollectionChangeEvent) => {
-        expect(event.added?.id).toEqual('123');
+        expect(event.added?.[0]?.id).toEqual('123');
       }
     );
     scope.add({