"417": "Expectation failed",
"418": "No verification image in session",
"419": "Verification code mismatch",
- "420": "Account already exists"
+ "420": "Account already exists",
+ "500": "Internal server error",
+ "501": "Not implemented",
+ "502": "Bad gateway",
+ "503": "Service unavailable",
+ "504": "Gateway timeout",
+ "505": "HTTP version not supported"
}