Explicit or implicit login?

Question

Burglary protection

What are the advantages of explicit and implicit login?
For security reasons, if we do not hide, for example, a phone number, then we can be bombarded with SMS messages or calls, thereby not noticing something important. Login to oracle on 3 unsuccessful inputs will be blocked.
It turns out not all logins should be explicit. I can not find literature on this topic, I would be grateful.

Answer 1

I don’t understand what the words mean, but you should try to hide the logins under which authentication takes place as much as possible. For you to read:
OWASP
This is the only resource where you will find how to do it.
In general, the login is personal data, the confidentiality of the login is subject to protection in accordance with 152-FZ.

Answer 2

google Identity and Access Management
, although as I understand it, you are just asking the client side - well, everything is simple here and self-evident