[management,client] Add support to configurable prompt login (#3660)

client/internal/auth/pkce_flow.go

@@ -94,13 +94,17 @@ func (p *PKCEAuthorizationFlow) RequestAuthInfo(ctx context.Context) (AuthFlowIn
 	p.codeVerifier = codeVerifier
 
 	codeChallenge := createCodeChallenge(codeVerifier)
-	authURL := p.oAuthConfig.AuthCodeURL(
-		state,
+
+	params := []oauth2.AuthCodeOption{
 		oauth2.SetAuthURLParam("code_challenge_method", "S256"),
 		oauth2.SetAuthURLParam("code_challenge", codeChallenge),
 		oauth2.SetAuthURLParam("audience", p.providerConfig.Audience),
-		oauth2.SetAuthURLParam("prompt", "login"),
-	)
+	}
+	if !p.providerConfig.DisablePromptLogin {
+		params = append(params, oauth2.SetAuthURLParam("prompt", "login"))
+	}
+
+	authURL := p.oAuthConfig.AuthCodeURL(state, params...)
 
 	return AuthFlowInfo{
 		VerificationURIComplete: authURL,

client/internal/auth/pkce_flow_test.go

@@ -0,0 +1,49 @@
+package auth
+
+import (
+	"context"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+
+	"github.com/netbirdio/netbird/client/internal"
+)
+
+func TestPromptLogin(t *testing.T) {
+	tt := []struct {
+		name   string
+		prompt bool
+	}{
+		{"PromptLogin", true},
+		{"NoPromptLogin", false},
+	}
+
+	for _, tc := range tt {
+		t.Run(tc.name, func(t *testing.T) {
+			config := internal.PKCEAuthProviderConfig{
+				ClientID:              "test-client-id",
+				Audience:              "test-audience",
+				TokenEndpoint:         "https://test-token-endpoint.com/token",
+				Scope:                 "openid email profile",
+				AuthorizationEndpoint: "https://test-auth-endpoint.com/authorize",
+				RedirectURLs:          []string{"http://127.0.0.1:33992/"},
+				UseIDToken:            true,
+				DisablePromptLogin:    !tc.prompt,
+			}
+			pkce, err := NewPKCEAuthorizationFlow(config)
+			if err != nil {
+				t.Fatalf("Failed to create PKCEAuthorizationFlow: %v", err)
+			}
+			authInfo, err := pkce.RequestAuthInfo(context.Background())
+			if err != nil {
+				t.Fatalf("Failed to request auth info: %v", err)
+			}
+			pattern := "prompt=login"
+			if tc.prompt {
+				require.Contains(t, authInfo.VerificationURIComplete, pattern)
+			} else {
+				require.NotContains(t, authInfo.VerificationURIComplete, pattern)
+			}
+		})
+	}
+}