Publishing LinkedIn Posts via the UGC API v2: Steps, Example, and Pitfalls
Publish LinkedIn posts programmatically using the UGC API v2. Learn to handle OAuth tokens, two-step media uploads, and pagination while avoiding rate limits.
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linkedinDiagnosing 'invalid_grant' Errors in OAuth 2.0 Authorization Code Exchange
Learn why OAuth 2.0 returns 'invalid_grant' when exchanging an authorization code, how to spot the exact cause with a diagnostic table, and step‑by‑step checks to fix redirect URI mismatches, code reuse, expiration, or clock skew.
Registering OAuth2 Clients on Ory Hydra With Dynamic Client Registration
Dynamic client registration (DCR) lets you add new OAuth2/OIDC clients to Ory Hydra automatically, cutting admin overhead. Learn how to craft the payload, validate redirect URIs, and avoid common pitfalls.
orySecuring Backend Services with Okta OAuth 2.0 Tokens: An Architecture Note
Secure a backend API with Okta by validating JWTs against the Authorization Server’s JWKS, enforcing issuer, audience, and custom scopes. Follow a minimal design that uses a single AS and RS, implement caching, monitor JWKS rotation, and be ready to switch to FGA or mTLS when needed.
oktaLimits of OAuth 2.0 Playground for Temporary Access Tokens in API Testing
Goal Validate a Google API integration without exposing production service account keys by using the OAuth 2.0 Playground to generate short‑lived access tokens. Constraints Tokens are bound to the OAuth client ID used in the Playground, have a fixed expiration (typically a few hours), and are limited to the scopes consented during the authorization step. The
googleHow can I test the OAuth 2.0 authorization code flow with PKCE in a Delphi desktop app using a test Azure AD tenant without production credentials?
I need to verify that my Delphi VCL application can successfully obtain an access token from the Microsoft identity platform using the OAuth 2.0 authorization code flow with PKCE, while avoiding any use of production Azure AD credentials or real user data. The test environment must use a dedicated Azure AD test tenant, a localhost redirect URI that matches t
delphiOAuth 2.0 Token Refresh: Automatic Module Handling vs Manual Error Interception
When implementing secure service-to-service communication in Ballerina, managing the lifecycle of access tokens is critical for maintaining least-privilege access without causing service downtime. The Constraint The ballerina/auth/oauth2 module provides mechanisms for token management, but a design trade-off exists when handling expired credentials for user-
ballerinainvalid_grant error when refreshing a restored OAuth 2.0 refresh token
Problem: invalid_grant on restored token Goal: Determine how an OAuth 2.0 authorization server handles a refresh token that has been restored from backup after it has been revoked or expired. Constraints: The spec does not mandate token rotation; some servers reuse the same refresh token, others issue a new one. Backup restoration may bring an old token that
oauthOpenAPI 3.x security requirements and scope-based permission modeling
Implementing a least-privilege security model in OpenAPI 3.x requires a decision on how to represent fine-grained permissions within the security array. While the specification allows for the definition of securitySchemes under components, there is ambiguity in how to best map complex server-side authorization policies to the documentation. The current chall
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