-PDP_HTTP_USER_ID=testpdp
-PDP_HTTP_PASSWORD=alpha123
-PDP_PAP_PDP_HTTP_USER_ID=testpap
-PDP_PAP_PDP_HTTP_PASSWORD=alpha123
+PDP_HTTP_USER_ID=${PDP_HTTP_USER_ID}
+PDP_HTTP_PASSWORD=${PDP_HTTP_PASSWORD}
+PDP_PAP_PDP_HTTP_USER_ID=${PDP_PAP_PDP_HTTP_USER_ID}
+PDP_PAP_PDP_HTTP_PASSWORD=${PDP_PAP_PDP_HTTP_PASSWORD}