Use API key for publishing to GitHub package repository (#1389)

Author: pascalberger

.github/workflows/build.yml

@@ -44,9 +44,8 @@ jobs:
           AZURE_USER: ${{ secrets.AZURE_USER }}
           CODECOV_REPO_TOKEN: ${{ secrets.CODECOV_REPO_TOKEN }}
           GITHUB_PAT: ${{ secrets.GH_TOKEN }}
-          GPR_PASSWORD: ${{ secrets.GPR_PASSWORD }}
           GPR_SOURCE: ${{ secrets.GPR_SOURCE }}
-          GPR_USER: ${{ secrets.GPR_USER }}
+          GPR_API_KEY: ${{ secrets.GH_TOKEN }}
           NUGET_API_KEY: ${{ secrets.NUGET_API_KEY }}
           NUGET_SOURCE: "https://api.nuget.org/v3/index.json"
       - name: Upload Issues