Reset settings sync token on 401, fixes #91653 (#91726)

src/vs/workbench/contrib/userDataSync/browser/userDataSync.ts

@@ -155,7 +155,7 @@ export class UserDataSyncWorkbenchContribution extends Disposable implements IWo
 			this._register(Event.debounce(userDataSyncService.onDidChangeStatus, () => undefined, 500)(() => this.onDidChangeSyncStatus(this.userDataSyncService.status)));
 			this._register(userDataSyncService.onDidChangeConflicts(() => this.onDidChangeConflicts(this.userDataSyncService.conflictsSources)));
 			this._register(userDataSyncService.onSyncErrors(errors => this.onSyncErrors(errors)));
-			this._register(this.authTokenService.onTokenFailed(_ => this.authenticationService.getSessions(this.userDataSyncStore!.authenticationProviderId)));
+			this._register(this.authTokenService.onTokenFailed(_ => this.onTokenFailed()));
 			this._register(this.userDataSyncEnablementService.onDidChangeEnablement(enabled => this.onDidChangeEnablement(enabled)));
 			this._register(this.authenticationService.onDidRegisterAuthenticationProvider(e => this.onDidRegisterAuthenticationProvider(e)));
 			this._register(this.authenticationService.onDidUnregisterAuthenticationProvider(e => this.onDidUnregisterAuthenticationProvider(e)));
@@ -255,6 +255,16 @@ export class UserDataSyncWorkbenchContribution extends Disposable implements IWo
 		}
 	}
 
+	private async onTokenFailed(): Promise<void> {
+		if (this.activeAccount) {
+			const accounts = (await this.authenticationService.getSessions(this.userDataSyncStore!.authenticationProviderId) || []);
+			const matchingAccount = accounts.filter(a => a.id === this.activeAccount?.id)[0];
+			this.setActiveAccount(matchingAccount);
+		} else {
+			this.setActiveAccount(undefined);
+		}
+	}
+
 	private async onDidRegisterAuthenticationProvider(providerId: string) {
 		if (providerId === this.userDataSyncStore!.authenticationProviderId) {
 			await this.initializeActiveAccount();