Overview
This presentation explains how to implement and use Coinsquare Login for secure developer and user access. It covers authentication flows, developer-centric integration tips, security hardening, and user experience considerations. Use the code snippets and links below to quickly prototype a safe login flow.
Authentication flows (high level)
1. OAuth 2.0 for delegated access (recommended)
For apps requiring user consent or delegated access to a user's account (read-only or trading scopes), use OAuth 2.0 authorization code flow. This provides tokens that can be scoped and rotated without exposing user credentials.
2. API Keys for server-to-server
For backend integrations (e.g., market data, webhook management), issue API keys with restricted scopes and IP allowlists. Rotate keys and store them in secrets managers.
3. 2FA and WebAuthn for extra security
Require MFA for sensitive operations. Consider WebAuthn (passkeys) for phishing-resistant authentication and better UX on modern platforms.
Developer quick-start (example)
Below is a minimal example showing an OAuth 2.0 Authorization Code flow: exchange an authorization code for tokens on your server.
POST /oauth/token
Host: api.coinsquare.com
Content-Type: application/x-www-form-urlencoded
grant_type=authorization_code&code=AUTH_CODE&redirect_uri=YOUR_REDIRECT_URI&client_id=YOUR_CLIENT_ID&client_secret=YOUR_SECRET
Store the returned access_token in memory for short-lived operations and persist the refresh_token securely if needed for continuing sessions server-side.
Security best practices
Secure storage and secrets
Never hardcode credentials. Use environment variables and cloud secret stores. Limit token TTL and scope. Implement automatic key rotation.
Protect against common attacks
- Use HTTPS for all endpoints; HSTS headers are recommended.
- Enable rate limiting and anomaly detection on login endpoints to reduce brute force attempts.
- Use CSP and secure cookies (
HttpOnly,Secure,SameSite=Strict) to protect sessions. - Log authentication events and retain secure audit trails.
Session management
Use short-lived access tokens and refresh tokens for continuous sessions. Revoke tokens on suspicious activity and provide users an easy way to sign out from all devices.
UI/UX considerations for "Coinsquare Login"
Design login flows that are clear and minimize user friction. Progressive disclosure for MFA setup, clear error messages (avoid leaking whether an email exists), and accessible labels ensure both security and accessibility.
Monitoring & incident response
Instrument auth endpoints to detect unusual patterns (IP spikes, impossible travel). Have a documented incident response for compromised credentials, including forced password resets and mandatory MFA re-enrollment.
Developer checklist
- Use OAuth 2.0 where possible.
- Enforce HTTPS and HSTS.
- Implement MFA (prefer WebAuthn).
- Rotate secrets and revoke old keys.
- Log auth events and monitor anomalies.
- Provide account recovery with strong safeguards.
Code sample: token refresh (pseudo)
// Server-side refresh
const resp = await fetch('https://api.coinsquare.com/oauth/token',{method:'POST',body: new URLSearchParams({grant_type:'refresh_token',refresh_token: stored,client_id,client_secret})});
const json = await resp.json();
// replace access token and update expiry