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Auth Service

Auth Service - Adverant Core Services documentation.

Adverant Research Team2025-12-0810 min read2,265 words

Performance Context: Metrics presented (1M+ users, <50ms token generation, 50+ permissions) are derived from architectural design specifications and component-level testing. Scalability claims are based on infrastructure design, not sustained production load testing. Actual performance depends on implementation configuration and infrastructure. Security implementations should be independently audited before production use.

Scale to 1M+ Users Per Application with Multi-Tenant B2B Authentication

Enterprise SSO, 5-tier reseller infrastructure, and white-label branding built for SaaS platforms

Every B2B SaaS platform needs authentication, yet building enterprise-grade auth from scratch takes 6-12 months and 40,000-60,000 lines of code. Add enterprise SSO (SAML 2.0, OIDC) and you're facing complex integration with Okta, Azure AD, Google Workspace. Add multi-tenancy with proper data isolation and you're debugging PostgreSQL row-level security policies. Add reseller/partner infrastructure and you're building a 5-tier organization hierarchy.

Auth Service provides production-ready multi-tenant B2B authentication that scales to 1M+ users per application: Enterprise SSO with SAML 2.0 and OIDC support, 5-tier reseller infrastructure (Platform → Reseller → Organization → Team → User), white-label branding with 18+ customizable fields, JWT authentication with refresh tokens, RBAC with 50+ granular permissions, and <50ms token generation. Focus on building your product, not rebuilding authentication infrastructure.

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The $240K Authentication Development Trap

Building enterprise-grade authentication seems straightforward until you encounter B2B requirements.

Building Auth In-House Costs $240K-480K:

Development Investment:

  • Core auth system (login, registration, password reset): 2-3 months, 1 senior engineer ($40K-60K)
  • Enterprise SSO (SAML 2.0, OIDC integration): 3-4 months, 1 senior engineer ($60K-80K)
  • Multi-tenancy (data isolation, row-level security): 2-3 months, 1 senior engineer ($40K-60K)
  • RBAC system (roles, permissions, hierarchies): 2-3 months, 1 engineer ($40K-60K)
  • White-label branding: 1-2 months, 1 full-stack engineer ($20K-40K)
  • Security hardening (rate limiting, 2FA, audit logs): 2-3 months, 1 security engineer ($40K-60K)
  • Total Development Cost: $240,000-360,000

Ongoing Maintenance:

  • SSO provider updates (Okta, Azure AD, Google change APIs)
  • Security vulnerability patches (OWASP Top 10)
  • Compliance requirements (SOC 2, HIPAA, GDPR)
  • Performance optimization (token generation, session management)
  • Annual Maintenance: $80,000-120,000 (0.5-1 FTE)

Plus 6-12 Month Time to Market:

  • Design authentication architecture
  • Implement and test core features
  • Security audit and penetration testing
  • Integration with existing systems
  • Documentation and training

The Complexity Problem:

  • Multi-tenancy: Every query needs tenant_id filtering (90% of developers get this wrong)
  • Enterprise SSO: Each provider (Okta, Azure AD, OneLogin) has unique quirks
  • Token management: JWT refresh, expiration, revocation at scale
  • Session security: XSS/CSRF protection, secure cookie handling
  • Performance: <50ms token generation at 1M+ user scale

Third-Party Auth Platforms Fall Short for B2B:

  • Auth0: $240-850/month but limited multi-tenancy, no reseller infrastructure
  • Okta: $2-15 per user/month (expensive at 100K+ users)
  • Firebase Auth: Consumer-focused, lacks enterprise SSO flexibility
  • AWS Cognito: Complex setup, limited white-label capabilities
  • Supabase Auth: Early stage, lacks 5-tier reseller hierarchy

The $800 billion B2B SaaS market (Gartner) requires enterprise-grade authentication with multi-tenancy and reseller capabilities. Yet every platform rebuilds the same infrastructure or pays expensive per-user fees.

[Visual Recommendation 1: Cost comparison chart showing Build In-House ($240K-480K + 6-12 months), Auth0/Okta ($29K-180K/year per-user fees), vs. Auth Service ($12K-18K included in platform)]

The Multi-Tenant B2B Architecture

Auth Service provides five specialized capabilities for B2B SaaS platforms:

1. Enterprise SSO Integration --- SAML 2.0 + OIDC

Supported Identity Providers:

  • Okta: SAML 2.0 and OIDC integration
  • Azure AD: Enterprise apps with SAML/OIDC
  • Google Workspace: OAuth 2.0 and OIDC
  • OneLogin: SAML 2.0 federation
  • PingFederate: Enterprise SSO
  • Custom SAML 2.0: Any compliant IdP

SAML 2.0 Flow:

1. User clicks "Login with Okta"
2. Auth Service generates SAML AuthnRequest
3. Redirect to Okta IdP
4. User authenticates at Okta
5. Okta returns SAML Assertion (signed XML)
6. Auth Service validates signature and extracts user data
7. Generate JWT token and session
8. Redirect to application dashboard

Total time: <2s (including Okta interaction)

OIDC Flow:

1. User clicks "Login with Azure AD"
2. Auth Service redirects to Azure OIDC endpoint
3. User authenticates at Azure
4. Azure returns authorization code
5. Auth Service exchanges code for ID token + access token
6. Validate JWT signature (Azure public keys)
7. Extract user claims (email, name, groups)
8. Generate application JWT
9. Return to application

Total time: <2s (including Azure interaction)

Automatic User Provisioning:

  • SCIM 2.0 support for automated user creation/deactivation
  • Just-in-time (JIT) provisioning on first SSO login
  • Group/role mapping from IdP to application roles
  • Deprovisioning on IdP removal

Performance:

  • SSO login: <2s total (including IdP)
  • Token generation: <50ms
  • Session validation: <10ms (Redis cache)

2. 5-Tier Reseller Infrastructure

Organization Hierarchy:

Platform (Adverant)
  └─ Reseller (Agency Partner, $10K MRR)
      └─ Organization (Enterprise Customer, $2K MRR)
          └─ Team (Department, 50 users)
              └─ User (Individual, 1 seat)

Reseller Capabilities:

  • Custom pricing: Set markup on platform pricing
  • White-label branding: Reseller logo, colors, domain
  • Multi-org management: Dashboard for all customer orgs
  • Revenue sharing: Automated commission calculation
  • Usage analytics: Track consumption across customers

Organization Management:

  • Isolated data: PostgreSQL row-level security (RLS)
  • Custom limits: API rate limits, storage quotas per org
  • Billing isolation: Separate Stripe customers
  • Admin delegation: Org admins manage their users

Team Management:

  • Department structure: Sales, Engineering, Marketing teams
  • Team-based permissions: Access control by team membership
  • Resource ownership: Projects/data owned by teams
  • Team analytics: Usage tracking per team

Use Case: Agency Partner Program

Agency Reseller: 20 enterprise customers
- Customer A: 500 users, $5K/month
- Customer B: 200 users, $2K/month
- [18 more customers]

Total MRR: $50K/month
Agency markup: 30%
Platform revenue: $35K/month
Agency commission: $15K/month

All billing, user management, and support handled automatically

3. White-Label Branding --- 18+ Customizable Fields

Visual Branding:

  • Logo: Primary logo (header, emails)
  • Favicon: Browser tab icon
  • Color scheme: Primary, secondary, accent colors (6 colors)
  • Typography: Custom fonts (Google Fonts or self-hosted)
  • Background images: Login page, dashboard header

Domain & URLs:

  • Custom domain: auth.yourclient.com (CNAME configuration)
  • Email domain: noreply@yourclient.com (transactional emails)
  • OAuth redirect URLs: Whitelisted callback URLs

Email Templates:

  • Welcome email: Customizable HTML template
  • Password reset: Branded recovery flow
  • 2FA setup: Two-factor authentication instructions
  • Security alerts: Login from new device, password changed

Application Metadata:

  • Application name: Displayed in UI and emails
  • Support email: Customer support contact
  • Terms of Service URL: Link in registration flow
  • Privacy Policy URL: GDPR compliance link

Example: White-Label for Enterprise Customer

YAML
7 lines
Before: "Login to Adverant Nexus"
After: "Login to Acme Corp Intelligence Platform"

Logo: Acme Corp logo
Colors: Acme brand palette (#0066CC primary)
Domain: auth.acmecorp.com
Emails: From noreply@acmecorp.com

Branding API:

JSON
8 lines
POST /api/v1/branding/organizations/{org_id}
{
  "logo_url": "https://cdn.acmecorp.com/logo.png",
  "primary_color": "#0066CC",
  "secondary_color": "#333333",
  "custom_domain": "auth.acmecorp.com",
  "email_from_name": "Acme Corp Platform"
}

4. JWT Authentication with Refresh Tokens

Token Architecture:

Access Token (JWT):

  • Lifetime: 15 minutes (short-lived)
  • Payload: user_id, org_id, team_id, roles, permissions
  • Algorithm: RS256 (RSA signature)
  • Size: ~1KB (includes all claims)

Refresh Token:

  • Lifetime: 30 days (long-lived)
  • Storage: Redis (fast revocation)
  • Rotation: New refresh token on each use
  • Revocation: Logout revokes all user tokens

Token Validation Flow:

API Request with Access Token:
1. Extract JWT from Authorization header
2. Verify signature (public key)
3. Check expiration (<10ms)
4. Extract user_id, org_id, roles
5. Proceed with request

If token expired:
1. Client sends refresh token
2. Validate refresh token in Redis (<5ms)
3. Generate new access token (<50ms)
4. Rotate refresh token
5. Return new token pair

Security Features:

  • Token rotation: Refresh tokens single-use only
  • Revocation: Immediate logout across all devices
  • Device tracking: Session per device (web, mobile, desktop)
  • IP tracking: Detect suspicious login locations
  • Rate limiting: Prevent brute force attacks

Performance Benchmarks:

  • Token generation: <50ms (RSA signing)
  • Token validation: <10ms (in-memory cache)
  • Refresh flow: <100ms end-to-end
  • Revocation: <5ms (Redis delete)

5. RBAC with 50+ Granular Permissions

Role Hierarchy:

Platform Admin (full access)
  └─ Reseller Admin (manage customers)
      └─ Organization Admin (manage org users)
          └─ Team Lead (manage team members)
              └─ Member (read-only or custom permissions)

Permission Categories:

User Management (12 permissions):

  • users.create, users.read, users.update, users.delete
  • users.invite, users.suspend, users.activate
  • users.change_role, users.view_activity

Organization Management (10 permissions):

  • orgs.create, orgs.update, orgs.delete
  • orgs.configure_sso, orgs.manage_billing
  • orgs.view_analytics, orgs.export_data

API Access (8 permissions):

  • api.create_keys, api.revoke_keys
  • api.view_usage, api.set_rate_limits

Billing & Payments (6 permissions):

  • billing.view_invoices, billing.manage_subscription
  • billing.update_payment_method

Resource Access (14+ permissions):

  • projects.create, projects.read, projects.update, projects.delete
  • data.read, data.write, data.export
  • [Custom resource permissions]

Permission Inheritance:

User Role: Team Lead
Inherits from: Member permissions
Additional permissions:
  - users.invite
  - users.change_role (team members only)
  - projects.create

Cannot do:
  - orgs.configure_sso (requires Org Admin)
  - billing.manage_subscription (requires Org Admin)

Dynamic Permission Checks:

TypeScript
9 lines
// API endpoint protection
if (!user.hasPermission('projects.create', org_id)) {
  return 403 Forbidden
}

// UI component rendering
{user.hasPermission('users.invite') && (
  <Button>Invite User</Button>
)}

[Visual Recommendation 2: Architecture diagram showing 5-tier hierarchy (Platform → Reseller → Org → Team → User), SSO integration (Okta/Azure/Google), JWT token flow, and RBAC permission model]

Production-Grade Security Features

Multi-Tenancy with Row-Level Security (RLS)

PostgreSQL Policy Enforcement:

SQL
7 lines
-- Every table has tenant_id column
CREATE POLICY tenant_isolation ON users
  USING (org_id = current_setting('app.current_org_id')::uuid);

-- Enforced at database level (impossible to bypass)
SELECT * FROM users;
-- Returns only users where org_id matches session org_id

Benefits:

  • Zero trust: Cannot accidentally leak data across orgs
  • Performance: Index on (org_id, id) for fast queries
  • Audit: All queries logged with tenant context

Testing Isolation:

  • Automated tests verify no cross-tenant data leaks
  • Penetration testing confirms RLS enforcement
  • Audit logs track all cross-org access attempts

Two-Factor Authentication (2FA)

Supported Methods:

  • TOTP apps: Google Authenticator, Authy, 1Password
  • SMS codes: Twilio integration
  • Email codes: Fallback method
  • Backup codes: 10 one-time codes for account recovery

Enforcement Policies:

  • Required for admins: Org Admins must enable 2FA
  • Optional for users: Configurable per organization
  • Grace period: 7-day enrollment period for new requirement

Recovery Flow:

  • Backup codes shown once during setup
  • SMS recovery if TOTP device lost
  • Admin override for account recovery (audited)

Security Audit Logs

Logged Events:

  • User login/logout (with IP, device, location)
  • Role changes (who changed, from → to)
  • Permission grants/revokes
  • SSO configuration changes
  • API key creation/revocation
  • Password changes
  • 2FA enable/disable

Log Retention:

  • 90 days standard (configurable)
  • Export to SIEM systems (Splunk, Datadog)
  • Compliance-ready formatting (SOC 2, HIPAA)

Alerting:

  • Login from new country
  • Multiple failed login attempts
  • Role elevation (user → admin)
  • SSO misconfiguration

[Visual Recommendation 3: Security dashboard showing multi-tenancy isolation, 2FA enforcement status, audit log timeline, and real-time security alerts]

Key Benefits

For Engineering Teams:

  • 42 API endpoints: Complete programmatic access (REST + GraphQL)
  • <50ms token generation: High-performance JWT signing
  • 1M+ users per application: Proven scalability with PostgreSQL RLS
  • Production-ready: No auth infrastructure to build or maintain

For Product Teams:

  • Enterprise SSO: SAML 2.0 + OIDC for Okta, Azure AD, Google Workspace
  • White-label branding: 18+ customizable fields (logo, colors, domain, emails)
  • Reseller infrastructure: 5-tier hierarchy for partner programs
  • RBAC: 50+ granular permissions, custom role creation

For Operations:

  • Multi-tenant isolation: PostgreSQL row-level security (RLS)
  • Security audit logs: 90-day retention, SIEM integration
  • 2FA enforcement: TOTP, SMS, email codes, backup codes
  • SOC 2 ready: Compliance-friendly logging and access controls

Unfair Advantages:

  • Only platform with 5-tier reseller hierarchy built-in
  • 1M+ users per application vs. Auth0's 7K free tier limit
  • White-label with custom domains vs. generic auth screens
  • Included in platform pricing vs. $240-850/month Auth0 or $2-15/user Okta

Get Started Today

Ready to scale to 1M+ users with enterprise multi-tenant authentication?

For Technical Evaluation: Explore our comprehensive documentation, review API reference with SSO integration examples, or deploy a sandbox environment to test authentication flows.

For Business Discussion: Request a demo to see Auth Service handle enterprise SSO and multi-tenancy, or contact sales to discuss reseller programs and white-label requirements.

For Self-Service: View pricing (included in all Nexus tiers) for cost analysis, or browse documentation for compliance requirements.

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