feat(cli): added implementation for codeflow with a cli (#26)

example/client/github/github.go

@@ -0,0 +1,43 @@
+package main
+
+import (
+	"context"
+	"fmt"
+	"github.com/caos/oidc/pkg/cli"
+	"github.com/caos/oidc/pkg/rp"
+	"github.com/google/go-github/v31/github"
+	githubOAuth "golang.org/x/oauth2/github"
+	"os"
+)
+
+var (
+	callbackPath string = "/orbctl/github/callback"
+	key          []byte = []byte("test1234test1234")
+)
+
+func main() {
+	clientID := os.Getenv("CLIENT_ID")
+	clientSecret := os.Getenv("CLIENT_SECRET")
+	port := os.Getenv("PORT")
+
+	rpConfig := &rp.Config{
+		ClientID:     clientID,
+		ClientSecret: clientSecret,
+		CallbackURL:  fmt.Sprintf("http://localhost:%v%v", port, callbackPath),
+		Scopes:       []string{"repo", "repo_deployment"},
+		Endpoints:    githubOAuth.Endpoint,
+	}
+
+	oauth2Client := cli.CodeFlowForClient(rpConfig, key, callbackPath, port)
+
+	client := github.NewClient(oauth2Client)
+
+	ctx := context.Background()
+	_, _, err := client.Users.Get(ctx, "")
+	if err != nil {
+		fmt.Println("OAuth flow failed")
+	} else {
+
+		fmt.Println("OAuth flow success")
+	}
+}