Connect to remote Server with macOS Sierra through sftp

I recently moved from Ubuntu GNOME (16.04 LTS) to macOS Sierra and I wondered how I could mount a Folder, located on a remote Server, using the sftp protocol. Ubuntu GNOME (16.04) comes with as a File Manager by default, so I used that one for the purpose of having a gui for viewing remote folders. [Setup with Ubuntu GNOME and Nautilus File-manager] My workflow on Ubuntu was to open the Nautilus File manager - Click "Enter Server Adress" - Selecting the Connection (for example: sftp://user@example.com) - Click "Connect" I like to have a similar or even simpler solution for these steps on Sierra. However, the Server shouldn't always be mounted. I just want a simple way to connect to certain remote Folders with different usernames when I need to, through a save Connection. Any Ideas how to do this with Finder on macOS Sierra? I am kind a new to the whole Apple ecosystem, I don't even have a an idea where to look for recommended 3rd party software.