Unable to login as email. There's no instruction to register email either. bug

[nus-pe-script]

Describe the bug A clear and concise description of what the bug is.

Unable to login with email. Although the user guide stated that only registered email can be login, there is no instruction on registering email or sample email to use. In addition, what are the email providers that are allowed to be used?

To Reproduce Steps to reproduce the behavior:

1. Type "login chanchunchoeng@hotmail.com" or "login johnd@example.com".
2. See error "Login identity should be either the following: manager employee as EMAIL Example: login manager Example: login as hello@gmail.com""

Expected behavior A clear and concise description of what you expected to happen.

I should be able to login using my email address.

Screenshots If applicable, add screenshots to help explain your problem.

Additional context Add any other context about the problem here.

OS and Java Version

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_{[original: dummy#41]}