Generate OAuth authorization URL with state and nonce for CSRF and replay attack protection. State is stored with TTL for validation.
The URI to redirect to after OAuth consent. Must match the registered redirect URI in OAuth client configuration.
PKCE code challenge derived from code_verifier. Required for public clients to prevent authorization code interception attacks.
PKCE code challenge method, typically 'S256' (SHA-256 hash). Must be provided if code_challenge is specified.
Successful Response
Response containing OAuth authorization URL
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