added pam authenticator

etc/webfused.conf

@@ -25,6 +25,13 @@ authentication:
             file = "/etc/webfused/passwd"
         }
     }
+    # {
+    #    provider = "pam"
+    #    settings:
+    #    {
+    #      service_name = "webfused"
+    #    }
+    # }
 )
 
 filesystems: