How to create routing for kubernetes with nginx ingress in terraform - scaleway - kubernetes

Question

I have a kubernetes setup with a cluster and two pools (nodes), I have also setup an (nginx) ingress server for kubernetes with helm. All of this is written in terraform for scaleway. What I am struggling with is how to config the ingress server to route to my kubernetes pools/nodes depending on the url path.
For example, I want [url]/api to go to my scaleway_k8s_pool.api and [url]/auth to go to my scaleway_k8s_pool.auth.
This is my terraform code
provider "scaleway" {
zone = "fr-par-1"
region = "fr-par"
}
resource "scaleway_registry_namespace" "main" {
name = "main_container_registry"
description = "Main container registry"
is_public = false
}
resource "scaleway_k8s_cluster" "main" {
name = "main"
description = "The main cluster"
version = "1.20.5"
cni = "calico"
tags = ["i'm an awsome tag"]
autoscaler_config {
disable_scale_down = false
scale_down_delay_after_add = "5m"
estimator = "binpacking"
expander = "random"
ignore_daemonsets_utilization = true
balance_similar_node_groups = true
expendable_pods_priority_cutoff = -5
}
}
resource "scaleway_k8s_pool" "api" {
cluster_id = scaleway_k8s_cluster.main.id
name = "api"
node_type = "DEV1-M"
size = 1
autoscaling = true
autohealing = true
min_size = 1
max_size = 5
}
resource "scaleway_k8s_pool" "auth" {
cluster_id = scaleway_k8s_cluster.main.id
name = "auth"
node_type = "DEV1-M"
size = 1
autoscaling = true
autohealing = true
min_size = 1
max_size = 5
}
resource "null_resource" "kubeconfig" {
depends_on = [scaleway_k8s_pool.api, scaleway_k8s_pool.auth] # at least one pool here
triggers = {
host = scaleway_k8s_cluster.main.kubeconfig[0].host
token = scaleway_k8s_cluster.main.kubeconfig[0].token
cluster_ca_certificate = scaleway_k8s_cluster.main.kubeconfig[0].cluster_ca_certificate
}
}
output "cluster_url" {
value = scaleway_k8s_cluster.main.apiserver_url
}
provider "helm" {
kubernetes {
host = null_resource.kubeconfig.triggers.host
token = null_resource.kubeconfig.triggers.token
cluster_ca_certificate = base64decode(
null_resource.kubeconfig.triggers.cluster_ca_certificate
)
}
}
resource "helm_release" "ingress" {
name = "ingress"
chart = "ingress-nginx"
repository = "https://kubernetes.github.io/ingress-nginx"
namespace = "kube-system"
}
How would i go about configuring the nginx ingress server for routing to my kubernetes pools?