## Description
Adds `loginWithUsername` option to auth config. When set to true, it
will inject an `username` field into the collection config which
replaces the `email` field in the UI. The `email` field is still
required but not unique.
The `username` field can be extended by passing a field named `username`
to your auth collection. Anything added to this field will be combined
with the initial field.
- [X] I have read and understand the
[CONTRIBUTING.md](https://github.com/payloadcms/payload/blob/main/CONTRIBUTING.md)
document in this repository.
## Type of change
- [X] New feature (non-breaking change which adds functionality)
## Checklist:
- [X] Existing test suite passes locally with my changes
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Co-authored-by: Jarrod Flesch <jarrodmflesch@gmail.com>
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