Add the ability to define multiple authentication services

src/main/java/de/sebastianvonhelmersen/Database.java

@@ -46,7 +46,7 @@ public class Database {
         }
     }
 
-    public void addPlayer(String uuid, String mcusername, LdapUser user) {
+    public void addPlayer(String uuid, String mcusername, user user) {
         String query = "insert into players values (?, ?, ?, ?, ?, ?, ?)";
         try(PreparedStatement prep_query = this.statement.getConnection().prepareStatement(query)){
             prep_query.setString(1, uuid);