feat: allow to disable client-side redirect for email provider

[yannicktian]

What:

In case the user is using the Email provider, make it possible to disable the redirection after the response from the server.

Why:

Example: To make a user signin or signup flow more fluid, it may be desirable to handle email signin without a page reload.

How:

The Email Provider has been added to the list of the providers that allow disabled redirection
canRedirectBeDisabled = isCredentials || isEmail

Checklist:

• Documentation
• Tests (Tested it locally so far, through the developer application, looking good there)
• Ready to be merged

Also related:

• Issues/PRs: Custom Login Page Error Handling? #1192 Is it possible to avoid page reloading when using custom credentials? #989 feat(provider): option to disable client-side redirects (credentials) #1219
• Discussions: Return an error message to client in the same page #754

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[balazsorban44]

Thanks! Will check the functionality locally myself, until then, there is a little request. Could you update the docs at https://github.com/nextauthjs/next-auth/blob/main/www/docs/getting-started/client.md#using-the-redirect-false-option

to mention that redirect can also be disabled for the email provider from now on?

[yannicktian]

@balazsorban44 I've updated the docs

Here is a screenshot of the email page

[balazsorban44]

Sorry for the late discovery, but this should have been opened against the main branch, not canary! I'll close this PR as opening PRs against canary and change base to main introduces way too much merge conflicts and crashes with our release flow. SO SORRY FOR THIS! 🙏 could you please create a new PR with these changes against main?

[yannicktian]

@balazsorban44 Here you go: #1416
Sorry I saw somewhere that PR should be opened against the canary branch..