One logstash http input with multiple basic auth users

I want to setup a logstash pipeline with multiple users/passwords and use the different usernames to direct output to different elasticsearch indexes where each username has read/write access to the specific index so same credential can be used over Kibana as well. Something like -

input {
  http {
host => "0.0.0.0"
port => 5000
user => "user1","user2"
password => "password1","password2"
  }
}

output {
if[user] == "user1" {
    elasticsearch {
        id => "elastic1"
        hosts => ["localhost:9200"]
        index => "index1"
        user => "user1"
        password => "password1"
    }
}
else if[user] == "user2" {
    elasticsearch {
        id => "elastic2"
        hosts => ["localhost:9200"]
        index => "index2"
        user => "user2"
        password => "password2"
    }
}
}

Is this possible? What am I missing?

An http input creates an http server port that http clients can connect to. If you are using basic auth then it has a single user and password. If you have multiple http inputs listening on different ports they could have different users.