public async Task <NewUserMinimumParams> GetNewUserParams(string userName)
{
var authRequest = new AuthRequest()
{
ClientVersion = ClientVersion,
Username = userName,
EncryptedDeviceToken = ByteString.CopyFrom(EncryptedDeviceToken)
};
var rs = await ExecuteRest("authentication/get_new_user_params", authRequest.ToByteArray());
return(NewUserMinimumParams.Parser.ParseFrom(rs));
}