Allow login using email

Problem/Motivation

Currently, the module allows the login by only using the "name". For cases when the user tries to login using the "email" there are restrictions.

Steps to reproduce

1. Use the endpoint: /user/lost-password?_format=json to get a temp password
2. Check the mailbox and copy the temp password.
3. Use the endpoint: /user/login?_format=json with the payload: {"name":"some.user@example.com","pass":"cn3cYLFOkUboYg"}
4. The response will be: { "message": "Sorry, unrecognized username or password."}

Proposed resolution

Write a patch that will allow the login using "email" same as "name".

Remaining tasks

Write the patch

User interface changes

None.

API changes

Covered in the patch.

Data model changes

None.