Introduced help fnc for database

helpfunctions/adduser.js

@@ -0,0 +1,26 @@
+//Checking if user existis in DB table users 
+//if no inserts new user (implicitly)
+const handleAddUser = (requser, db) => {
+    db.transaction (trx => {
+        trx.select('username')
+        .from('users')
+        .where('username', 'ilike', requser)
+        .then ( data => {
+            if (data.length===0) {
+                return trx('users')
+                .returning('*')
+                .insert( {
+                    username: requser
+                })
+                .then(user => {
+                    console.log('Inserted new user implicitly.');
+                })
+            }
+        })
+        .then(trx.commit)
+        .catch(trx.rollback)
+    })
+}
+module.exports = {
+    handleAddUser
+}