add nice error message when exchange of token returns 401

[woloski]

right now it fails with the an empty message
we should show
"Please check your Client Secret on the settings plugin is the same as the one on the Auth0 dashboard"

[mgonto]

To test it out, add a Rule to your Auth0 account that always returns callback(new UnauthorizedError('doesnt work'));

[glena]

I will need the error message for all the possible reponses on the error_description field of the response to the call "oauth/token".

Also, what do you think about this? https://cloudup.com/c0CCRk5q1-y
It will autohide in 10 seconds or when the user clicks on close.

[glena]

ready on dev

[mgonto]

I still don't see a nice error: https://cloudup.com/c9X-XTW0BUI

[mgonto]

I don't know exactly what @woloski meant.

What I tried is the following:

• Create a Rule in my account that does the following:

returns callback(new UnauthorizedError('doesnt work'));

• Try to Log in with anything. It'll fail.
• There's an error shown in the URL but I don't see a nice popup or error message anywhere. We should show the user that there was an error logging in and redirect him again to the Login page in that case. This is what I got: https://cloudup.com/c2cGpim9jhr

[glena]

That was my first idea (check https://cloudup.com/c0CCRk5q1-y) and asked for the messages to show for each error.

Now what it does is to show an error page when, we validate the code in the callback url, the WS returns 401 (in the case of misconfiguration of secret, etc).

[mgonto]

I'm not sure what error @woloski is describing.

If you follow the steps I wrote down, you'll see that no error page is shown. If you want I can move that to a new issue, but IDK if this is the same. Can you clarify?