[Bug] Variable name cannot start with "GITHUB_" prefix.

[danielcshn]

Describe the bug
Variable name cannot start with "GITHUB_" prefix.

To Reproduce
Steps to reproduce the behavior:

1. Go to Settings > Environments > Add.. Environment variables > Add variable "GITHUB_TOKEN"
2. See error: Variable name cannot start with "GITHUB_" prefix.

Expected behavior
Note: If you also want to include the private repository, register the "personal access token" in the repository and set it to GITHUB_TOKEN specified in the workflow file.

Screenshots

Desktop (please complete the following information):

• OS: Windows 11 Pro (22H2 22621.2428)
• Browser: Google Chrome
• Version: 117.0.5938.150 (Build oficial) (64 bits)

[PrimeEagle]

I have a fix for this issue, pending approval of the pull request.

[NarciSource]

As an environment variable, GITHUB_TOKEN cannot be overwritten because it is a reserved word.

The meaning of the sentence

If you also want to include the private repository, register the "personal access token" in the repository and set it to GITHUB_TOKEN specified in the workflow file.

is to change the value assigned to the GITHUB_TOKEN variable in GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}, not secrets.GITHUB_TOKEN itself.

You can modify the workflow to change GITHUB_TOKEN: ${{ secrets.MY_PERSONAL_ACCESS_TOKEN }} and add MY_PERSONAL_ACCESS_TOKEN to the actions secrets variable.

However, a simpler way to grant access to a private repository is to adjust the permissions of secrets.GITHUB_TOKEN in the repository where this workflow is located.
For instructions, refer to this link.