found it like this

secret.tf

@@ -0,0 +1,24 @@
+resource "random_password" "influxdb_admin" {
+    length = 20
+    special = true
+    override_special = "-_."
+}
+
+resource "random_password" "influxdb_admin_token" {
+    length = 32
+    special = true
+    override_special = "-_."
+}
+
+
+resource "kubernetes_secret" "influxdb_auth" {
+    metadata {
+        name = "influxdb-auth"
+        namespace = kubernetes_namespace.this.metadata.0.name
+    }
+    data = {
+        "admin-password" = random_password.influxdb_admin.result
+        "admin-token" = random_password.influxdb_admin_token.result
+    }
+    type = "Opaque"
+}