code (string, required): OAuth authorization codestate (string, optional): CSRF protection token{
"access_token": "eyJ...",
"token_type": "Bearer",
"expires_in": 3600,
"user": {
"id": "usr_abc123",
"email": "alex@example.com",
"name": "Alex Chen",
"role": "manager"
}
}curl --location --request GET 'http://localhost:3000/api/auth/callback'{}