refactor(server): auth dto (#5593)

* refactor: AuthUserDto => AuthDto

* refactor: reorganize auth-dto

* refactor: AuthUser() => Auth()

server/test/fixtures/activity.stub.ts

@@ -9,7 +9,7 @@ export const activityStub = {
     id: 'activity-1',
     comment: 'comment',
     isLiked: false,
-    userId: authStub.admin.id,
+    userId: authStub.admin.user.id,
     user: userStub.admin,
     assetId: assetStub.image.id,
     asset: assetStub.image,
@@ -22,7 +22,7 @@ export const activityStub = {
     id: 'activity-2',
     comment: null,
     isLiked: true,
-    userId: authStub.admin.id,
+    userId: authStub.admin.user.id,
     user: userStub.admin,
     assetId: assetStub.image.id,
     asset: assetStub.image,