Fix credential validator: use UserToken auth scheme for Central Portal

Author: agrasth

.github/workflows/credential-validation.yml

@@ -37,25 +37,26 @@ jobs:
         run: |
           echo "Testing Maven Central (Central Portal) connection..."
 
+          # Central Portal uses UserToken auth scheme: Authorization: UserToken <base64(user:pass)>
+          TOKEN=$(echo -n "${{ secrets.CENTRAL_USERNAME }}:${{ secrets.CENTRAL_PASSWORD }}" | base64)
           HTTP_CODE=$(curl -s -o /dev/null -w '%{http_code}' \
-            -u "${{ secrets.CENTRAL_USERNAME }}:${{ secrets.CENTRAL_PASSWORD }}" \
-            "https://ossrh-staging-api.central.sonatype.com/service/local/staging/profiles")
+            -H "Authorization: UserToken $TOKEN" \
+            "https://central.sonatype.com/api/v1/publisher/status?id=validation-check")
 
           echo "Maven Central API response: $HTTP_CODE"
 
-          if [ "$HTTP_CODE" = "200" ]; then
+          # 404 = auth OK but deployment id not found (expected for a test id)
+          # 200 = auth OK
+          # 401 = invalid credentials
+          if [ "$HTTP_CODE" = "200" ] || [ "$HTTP_CODE" = "404" ]; then
             echo "status=SUCCESS" >> $GITHUB_OUTPUT
-            echo "message=Maven Central connection successful" >> $GITHUB_OUTPUT
+            echo "message=Maven Central credentials valid" >> $GITHUB_OUTPUT
             echo "✅ Maven Central credentials are valid"
           elif [ "$HTTP_CODE" = "401" ]; then
             echo "status=FAILURE" >> $GITHUB_OUTPUT
             echo "message=Authentication failed - invalid credentials" >> $GITHUB_OUTPUT
             echo "❌ Maven Central authentication failed (401)"
             exit 1
-          elif [ "$HTTP_CODE" = "403" ]; then
-            echo "status=SUCCESS" >> $GITHUB_OUTPUT
-            echo "message=Credentials valid (limited permissions on staging API is normal)" >> $GITHUB_OUTPUT
-            echo "✅ Maven Central credentials valid (403 on staging API is acceptable)"
           else
             echo "status=FAILURE" >> $GITHUB_OUTPUT
             echo "message=Connection failed - HTTP $HTTP_CODE" >> $GITHUB_OUTPUT