How to close MatDialogBox or any div when API is successful in NGXS state?

I have started learning state management using NGXS. So far everything is fine but have few questions regarding some scenarios like -

1. If a Mat Dialog box is open (or any div - here I've both the scenarios in my project) and from inside it an API is called, how can I close the dialog only if API returns success?

2. Suppose a user logs out, how can I reset the states to default values?

For the first case below is my code for the state, action & dispatcher:

abc.action.ts

export class AddExamCategory {
    static readonly type = '[ExamCategory] Add';
    constructor(public payload: ExamCategory) {}
}

abc.state.ts

export interface ExamCategoryStateModel {
    examCategoryList: ExamCategory[];
}

@State<ExamCategoryStateModel>({
    name: 'examCategory',
    defaults: {
        examCategoryList: []
    }
})

@Injectable()
export class ExamCategoryState {

    constructor(private _adminService: AdminService) {}

    @Action(AddExamCategory)
    addExamCategory({ getState, patchState }: StateContext<ExamCategoryStateModel>, { payload }: AddExamCategory) {
        return this._adminService.createExamCategory(payload).pipe(tap(response => {
            patchState({ examCategoryList: [] }); // Want to close the modal/div after this part. If API returns ERROR do not close.
        }));
    }
}

abc.component.ts

this.store.dispatch(new AddAdminUser({ ...this.adminRegistrationForm.value, password: this.password.value }))
    .subscribe(response => {
      this.store.dispatch(new GetAdminUsers());
      this.dialogRef.close(true)
    });

Currently it's like this but it closes no matter what's the status of API.

For the second case, in the service where I have written the logic for logout() I have written like this: this.store.reset({}). Though it's resetting the state but not with the default values in it. I have multiple states to reset on this single logout method.

How to work on these scenarios?

from How to close MatDialogBox or any div when API is successful in NGXS state?