Github user simonellistonball commented on the issue:
https://github.com/apache/metron/pull/1112
In the case of non-SSO ldap auth, there is a login form, it's just embedded
in the spring bits instead of the angular bits. It's not as pretty, but we
could add a login.jsp to make it exactly the same experience (but with a lower
angular maintenance surface).
In the SSO scenario, Knox provides a login form, so we don't need or want
one in the angular app.
In the direct api access scenario, you could provide a bearer token for SSO
with a jwt, or for non-SSO you would just provide basic auth creds and that
would auth against LDAP.
So, you can still provide creds, through either a token, or a browser based
form in all scenarios.
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