Trim the user/email provided for password resets

[joshtrichards]

• Resolves: UX: Forgot password form should trim user input #37408

Summary

Trims the username/email address provided by the user when requesting a lost password reset. This reduces support requests from users that complain about never receiving password reset emails (because we silently - from the user perspective - dropped the request as being a bogus username/email address).

Since this is a workflow where few indicators are provided to the user (to avoid security information leakage), it seems worthwhile to handle this for the user to catch this common and easy/no-risk scenario. We know with certainty that whitespaces are never allowed at the start/end of usernames so this is safe.

TODO

(nothing)

Checklist

• Code is properly formatted
• Sign-off message is added to all commits
• Tests (unit, integration, api and/or acceptance) are included
• Screenshots before/after for front-end changes
• Documentation (manuals or wiki) has been updated or is not required
• Backports requested where applicable (ex: critical bugfixes)

[come-nc]

I think it should be trimed before being sent to the hook then, no?

[jtrees]

I am unfamiliar with the Nextcloud code so I cannot review this but I want to thank you for this PR.

[joshtrichards]

I think it should be trimed before being sent to the hook then, no?

Indeed @come-nc. Fixed

[welcome]

Thanks for your first pull request and welcome to the community! Feel free to keep them coming! If you are looking for issues to tackle then have a look at this selection: https://github.com/nextcloud/server/issues?q=is%3Aopen+is%3Aissue+label%3A%22good+first+issue%22