added support for cmd specific env vars and auth

Author: jeffreyaven

.github/workflows/test.yaml

@@ -49,7 +49,7 @@ jobs:
       - name: Install psycopg2-binary for Windows
         if: matrix.os == 'windows-latest'
         run: |
-          pip install psycopg2-binary
+          pip install psycopg
         shell: powershell
       # End Windows