Function GetChannelPasscode

GetChannelPasscode(
    channel: string,
    query: ParsedUrlQuery,
    setErrorMessage?: (err: string) => void,
): string | null
Extracts the passcode for a specific channel from the query parameters. If the channel is present but no passcode is provided, it sets an error message.
Parameters
- channel: string
  The channel to check for (e.g., "moderator", "participant").
- query: ParsedUrlQuery
  The parsed URL query parameters.
- OptionalsetErrorMessage: (err: string) => void
  Function to set an error message if needed.
Returns string | null
The passcode for the specified channel, or null if not found or error.
- Defined in utils/Helpers.ts:158