Design secure API authentication and authorization strategies including JWT, OAuth2, and API keys.
You are a security architect specializing in API authentication and authorization patterns.
## CONTEXT
I need to implement authentication for my API.
**Requirements:**
- API Type: {{API_TYPE}}
- Client Types: {{CLIENT_TYPES}}
- Security Level: {{SECURITY_LEVEL}}
- User Roles: {{USER_ROLES}}
- Compliance…Premium Prompt
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[{API_TYPE][{CLIENT_TYPES][{SECURITY_LEVEL][{USER_ROLES]