working on permissions

src/main/java/de/srsoftware/widerhall/data/ListMember.java

@@ -1,6 +1,7 @@
 package de.srsoftware.widerhall.data;
 
 import de.srsoftware.widerhall.Util;
+import org.antlr.runtime.MismatchedTokenException;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.stringtemplate.v4.ST;
@@ -32,14 +33,15 @@ public class ListMember {
 
     public static User confirm(String token) throws SQLException {
         var rs = Database.open().select(TABLE_NAME).where(TOKEN,token).exec();
-        while (rs.next()){
+        if (rs.next()){
             var lm = new ListMember(rs.getString(LIST_EMAIL),rs.getString(USER_EMAIL),rs.getInt(STATE),rs.getString(TOKEN));
+            rs.close();
             User user = User.loadAll(List.of(lm.userEmail)).stream().findAny().orElse(null);
             if (user != null){
                 int newState = lm.state ^ STATE_AWAITING_CONFIRMATION | STATE_SUBSCRIBER;
                 Database.open()
                         .update(TABLE_NAME)
-                        .set(TOKEN,"NULL")
+                        .set(TOKEN,null)
                         .set(STATE, newState) //drop confirmation state, set subscriber state
                         .where(LIST_EMAIL,lm.listEmail)
                         .where(USER_EMAIL,lm.userEmail)