In order to be able to upload your project onto GitHub (or any other Git hosting site) you need to create a repository (see below) and then copy the clone URL. There are two options, either cloning using HTTPS which will require you set up a temporary access key, or SSH which requires setting up a more permanent SSH key.
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In order to be able to upload your project onto GitHub you need to firstly [https://docs.github.com/en/repositories/creating-and-managing-repositories/creating-a-new-repository create a remote repository] and then copy the clone URL. There are two options, either cloning using HTTPS which will require you set up a temporary access key, or SSH which requires setting up a more permanent SSH key, these are outlined here: