Proxy WebSocket Connection via Cloud Function

[alberto sansegundo]

Hello im building a flutter app that uses an external API for access to financial data.

The external API allows for websocket connections, however the auth method for connecting to the WS implies sending the api key in the url. Id like to use a cloud function to establish that connection, as proxy, so the connection is done directly between the user and the external API. How can I achieve this? are there better options? Any help is appreciated, Thanks