[code quality] Inconsistent variables naming

[ilyash-b]

websocket-sessions-management/handlers/onConnect/app.py

Lines 13 to 16 in 8557d26

	connection_id = event['requestContext']['connectionId']
	domain_name = event['requestContext']['domainName']
	stage = event['requestContext']['stage']
	userId = event['headers']['Sec-WebSocket-Protocol']

First 3 vs last one