fixed double callbacks causing ERR_HTTP_HEADERS_SENT

quickfix to fix ERR_HTTP_HEADERS_SENT, probable cause: double callback

functions/methods.ts

@@ -60,7 +60,6 @@ var methods = {
                         })
                     });
                 });
-                callback(err)
 	    });
             callback(err)
         })
@@ -165,27 +164,29 @@ var methods = {
         return null
     },
     verifyUserAccount: function(userData:any, callback:any) {
-        dbconn.user.beginTransaction(function(err:any) { // START TRANSACTION
-            if (err) { throw err }
-            // update user status
-            dbconn.user.query('UPDATE user SET ? WHERE id =' +userData.id, userData, function (err:any, rows:any, fields:any) {
-                if (err) {
-                    return dbconn.user.rollback(function() { throw err })
-                }
-                // delete verification token
-                dbconn.user.query('DELETE FROM verification WHERE user_id = '+userData.id, function (err:any, rows:any, fields:any) {
+	dbconn.user.getConnection(function(err:any, thisconn){
+            thisconn.beginTransaction(function(err:any) { // START TRANSACTION
+                if (err) { throw err }
+                // update user status
+                thisconn.query('UPDATE user SET ? WHERE id =' +userData.id, userData, function (err:any, rows:any, fields:any) {
                     if (err) {
-                        return dbconn.user.rollback(function() { throw err })
+                        return thisconn.rollback(function() { throw err })
                     }
-                    // COMMIT
-                    dbconn.user.commit(function(err:any) {
+                    // delete verification token
+                    thisconn.query('DELETE FROM verification WHERE user_id = '+userData.id, function (err:any, rows:any, fields:any) {
                         if (err) {
-                            return dbconn.user.rollback(function() { throw err })
+                            return thisconn.rollback(function() { throw err })
                         }
+                        // COMMIT
+                        thisconn.commit(function(err:any) {
+                            if (err) {
+                                return thisconn.rollback(function() { throw err })
+                            }
+                        })
                     })
                 })
             })
-            callback(err)
+        callback(err)
         })
     },
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