Sign-in and sign-up forms should display error messages when API Management throttles requests

[mikebudzynski]

API Management's authentication API imposes throttling. The sign-in/-up form should display an accurate error message, if the requests fail due to exceeding the limit of allowed calls.

@mikebudzynski, thank you for opening this issue. We will triage it within the next few business days.

@mikebudzynski, thank you for requesting this feature.

[Nzamuyejoram]

@mikebudzynski , thanks for the concern raised . we will try it soon.