Kibana handle multiple authentication methods

Elastic Stack Kibana
4

@Wolfram_Haussig hey, i am back again with a lot of testing:

https://my-url:5601/app/monitoring?auth_provider_hint=saml1

did not work as expected...

i really like this idea, so i started a lot of testing.
in my test setup i have 1x nginx server and 2x kibana server on different nodes.
nginx conf looks like this:

upstream kibana-oidc1 {
    ip_hash;
    server x.x.x.x:5601; --> kibana server 1
}
upstream kibana-saml {
    ip_hash;
    server x.x.x.x:5601; --> kibana server 2
}
location / {
    proxy_pass http://kibana-oidc1;
    proxy_redirect off;
    proxy_buffering off;
    proxy_read_timeout 300s;
    proxy_http_version 1.1;
    proxy_set_header Connection "Keep-Alive";
}
location /saml/ {
    proxy_pass http://kibana-saml;
    proxy_redirect off;
    proxy_buffering off;
    proxy_read_timeout 300s;
    proxy_http_version 1.1;
    proxy_set_header Connection "Keep-Alive";
    rewrite ^ http://my-url/saml;
}

in kibana.yml on kibana 2:

server.basePath: "/saml"

my-url/ --> use kibana server 1 with oidc1 (only oidc configured)
my-url/saml --> use kibana server 2 with saml (only oidc configured)

but I am not able to make it work the way I expect it to.
do you have an example how to handle your idea without using complete different kibana urls ?
my-url/ should always be the same and not my-other-url/.

best regards