Feature Request: Unspecific Login Errors

[TheTedder]

Current, the login endpoint returns a 404 not found code when the supplied email does not correspond to a user account and a 401 unauthorized code when the email corresponds to a user account but the password does not match the user's password. This is a security issue because it could be used to guess users' email addresses. The server should instead respond with a 401 if the email and password provided don't match an existing user account.

Affected Functionality

The login endpoint would need to be changed. This would be a breaking API change so the frontend would need to be notified of this too.

Other Relevant Issues

#177