Portals is a plugin that can be used to create warp pads that can warp between users. A portal is created by placing 8 obsidian in a square and placing one gold block in the middle. Then, you place a sign on top and put the text

[Portal]
name of portal

The plugin is made for 1.14 and is under the "target" folder. Take this jar file and put it into your servers plugins directory, and create a folder called "portals". Put a file in it named coordinateData.json, and fill this file with a {}.