What does "login" mean?

Credentials: the combination of a user's identification and password used to enter a computer, program, network, etc.

Login

Common synonyms include: access, access credentials, accessing, auth data, authenticate, authentication.

/ˈlɒɡ.ɪn/ name, noun, verb

name, noun, verb ·Uncommon ·College level

Noun

1
Credentials: the combination of a user's identification and password used to enter a computer, program, network, etc.
"I've forgotten my login again."
2
The process or an instance of logging in.
"Your login failed because you weren't connected to the office network."

Verb

Proper Noun

1
A surname.
2
A hamlet in Cilymaenllwyd community, west Carmarthenshire, Wales (OS grid ref SN1623).

"Your login attempt was not successful. Please try again."

A deverbal from log in.