fix(server): invite user type might be null (#4020)

apps/server/src/modules/workspaces/resolver.ts

@@ -198,12 +198,14 @@ export class WorkspaceResolver {
         user: true,
       },
     });
-    return data.map(({ id, accepted, type, user }) => ({
+    return data
-      ...user,
+      .filter(({ user }) => !!user)
-      permission: type,
+      .map(({ id, accepted, type, user }) => ({
-      inviteId: id,
+        ...user,
-      accepted,
+        permission: type,
-    }));
+        inviteId: id,
+        accepted,
+      }));
   }
 
   @Query(() => Boolean, {