docs(ilp): add ILP auth example (#5)

Author: jerrinot

examples.manifest.yaml

@@ -6,6 +6,18 @@
   header: |-
     Go client library [docs](https://pkg.go.dev/github.com/questdb/go-questdb-client)
     and [repo](https://github.com/questdb/go-questdb-client).
+- name: ilp-auth
+  lang: go
+  path: examples/auth/main.go
+  header: |-
+    Go client library [docs](https://pkg.go.dev/github.com/questdb/go-questdb-client)
+    and [repo](https://github.com/questdb/go-questdb-client).
+  auth:
+    kid: testUser1
+    d: 5UjEMuA0Pj5pjK8a-fa24dyIf-Es5mYny3oE_Wmus48
+  addr:
+    host: localhost
+    port: 9009
 - name: ilp-auth-tls
   lang: go
   path: examples/auth-and-tls/main.go

examples/auth/main.go

@@ -0,0 +1,47 @@
+package main
+
+import (
+	"context"
+	"log"
+	"time"
+
+	qdb "github.com/questdb/go-questdb-client"
+)
+
+func main() {
+	ctx := context.TODO()
+	sender, err := qdb.NewLineSender(
+		ctx,
+		qdb.WithAddress("localhost:9009"),
+		qdb.WithAuth(
+			"testUser1",
+			"5UjEMuA0Pj5pjK8a-fa24dyIf-Es5mYny3oE_Wmus48"),
+	)
+	if err != nil {
+		log.Fatal(err)
+	}
+	// Make sure to close the sender on exit to release resources.
+	defer sender.Close()
+	// Send a few ILP messages.
+	err = sender.
+		Table("trades").
+		Symbol("name", "test_ilp1").
+		Float64Column("value", 12.4).
+		At(ctx, time.Now().UnixNano())
+	if err != nil {
+		log.Fatal(err)
+	}
+	err = sender.
+		Table("trades").
+		Symbol("name", "test_ilp2").
+		Float64Column("value", 11.4).
+		At(ctx, time.Now().UnixNano())
+	if err != nil {
+		log.Fatal(err)
+	}
+	// Make sure that the messages are sent over the network.
+	err = sender.Flush(ctx)
+	if err != nil {
+		log.Fatal(err)
+	}
+}