createListenKey method
Start a new user data stream. The stream will close after 60 minutes unless a keepalive is sent.
If the account has an active listenKey, that listenKey will be returned and its validity will be extended for 60 minutes.
Implementation
Future<Either<String, String>> createListenKey() {
return sendRequest(
path: 'fapi/v1/listenKey',
type: RequestType.POST,
keyRequired: true,
).then((r) => r.isLeft ? Left(r.left) : Right(r.right['listenKey']));
}