Adding modules to goget is very easy. You can add a module by editing the file: /modules/modules.go.
Note: Please make sure to use the latest version. If the module is over v0 or v1 you have to add the latest major version as a suffix, eg. github.com/author/repo/v2 / github.com/author/repo/v3, etc.
As soon as the PR is merged, the module will be accessible to all users.