def check_appcode(sftp, appcode)
      path = remote_path(appcode)
      FastlaneCore::UI.message('Checking APPCODE')
      remote_mkdir(sftp, path)
    end
def check_appcode(sftp, appcode)
      path = remote_path(appcode)
      FastlaneCore::UI.message('Checking APPCODE')
      remote_mkdir(sftp, path)
    end
Private methods - Remote Operations
 Checks/creates remote APPCODE directory
 @param sftp
 @param [String] appcode