Implement API Authentication

[suhasramanand]

Implement secure authentication mechanisms for all APIs that access or transmit ePHI.

Acceptance criteria

• OAuth 2.0 or OpenID Connect required
• API keys must not be sole authentication method
• Token expiration: maximum 1 hour for access tokens
• Refresh token rotation required

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Source: § 4.1.1

Covered entities MUST implement secure authentication mechanisms for all APIs that access or transmit ePHI.