connectToBackend

suspend fun connectToBackend(v3Host: String, gatewayHost: String?, isSecure: Boolean, clientMode: FfiClientMode?, appVersion: String?, authCallback: FfiAuthCallback?, authHandle: FfiAuthHandle?): XmtpApiClient

connect to the XMTP backend specifying gateway_host enables the D14n backend and assumes host is set to the correct d14n backend url.