ngrx - 错误 TS2322：类型 '{ auth: (state: auth.State | undefined, action: All) => auth.State; }' 不可分配给类型 'ActionReducer';

Question

将 reducer 注册到 app.module.ts 时出错。错误 -> 错误：src/app/app.module.ts:25:26 - 错误 TS2322：类型 '{ auth: (state: auth.State | undefined, action: All) => auth.State; }' 不可分配给类型 'ActionReducer<unknown, Action>'。类型 '{ auth: (state: State | undefined, action: All) => State; }' 不提供与签名 '(state: unknown, action: Action): unknown' 的匹配。

该项目的 GIT 链接：https ://github.com/Shubhangi238/LoginApp.git