Create 10 practical methods for the secure development of APIs using OAuth 2.0 and OpenID Connect that help developers implement robust authentication and authorization systems.

Context: [API security, OAuth 2.0, OpenID Connect, authentication, authorization, access tokens, refresh tokens, identity provider, security standards, REST APIs, web APIs, best practices]

Goal: [Secure protection of APIs against unauthorized access, implementation of modern authentication protocols, improvement of user and developer experience, avoidance of security vulnerabilities]

For each method explain:
1) the specific application or technique in the context of OAuth 2.0 and OpenID Connect
2) example code or configuration examples (e.g. token validation, scopes handling, redirect URIs)
3) notes on advantages, possible risks, and best practices

The methods should:
- consider different API types (e.g. REST, GraphQL)
- address security aspects such as token security, expiration, and renewal
- show integration possibilities with identity providers (e.g. Auth0, Keycloak)
- be suitable for developers with knowledge of modern web development