Link Authenticator to UserService for actual authentication
Merge remote-tracking branch 'origin/master'

Conflicts:
	src/main/java/org/example/kickoff/auth/Authenticator.java
	src/main/java/org/example/kickoff/auth/LoginBean.java
	src/main/webapp/login.xhtml
Moved InvalidCredentialsException catch clause to Authenticator class ->
return false