React-admin: don't show warning message on checkAuth failure

Question

I have been doing the upgrade from React-Admin v2 to v3 for a while now. I'm almost finished, but there's something that I would like fine-tune.

Using v2, when user comes to our website at domain.tld without a token, Promise is rejected and user is redirected to domain.tld/#/login. No error/warning messages are shown.

Using v3, if the same situation happens, Promise is also rejected and user is redirected to the login page, but there comes the ra.auth.auth_check_error warning message - and twice!

I understand the logic, it may be useful most of the cases to display the warning message. For example if non-logged user tries to access domain.tld/#/settings, the user should be redirected to the login page and notify, that "you must login first". But if user comes to the website first time ever, he gets redirected to the login page as supposed to, but in this case that warning message should not be displayed. In this case the user is most likely known that he/she must login before seeing any content, so there's no point to warn the user since he/she didn't do anything wrong.

I don't know how easily this could be solved. Maybe just removing the notify completely? How that can be done?

Maybe some exception would be the other solution, that if user tries to access the root, domain.tld/#/, then the warning message would not be shown. And with other routes it would be shown. How this could be done?

Can the functionality what happens after Promise.reject() be overwritten somehow?

My checkAuth in authProvider.js:

checkAuth: () => localStorage.getItem("token")
    ? Promise.resolve()
    : Promise.reject(),

Answer 1

In your Promise.reject you can add a string that will be presented to the user when their authorization fails.

checkAuth: () => localStorage.getItem("token") 
    ? Promise.resolve() 
    : Promise.reject("You are not authorized to view this")

You could theoretically return a different message based on what page you're on but you don't have that info in the checkAuth.

You could also build your own login page and filter the messages so that no toasts popup for the login page.