Working (?) courses get func

services/db.js

@@ -21,6 +21,12 @@ const get = async (tableName, keyMap) => {
   return res && res.Item;
 };
 
+const scan = async (tableName) => {
+  const res = await dynamoClient.scan({
+    TableName: tableName
+  }).promise();
+};
+
 const queryByID = async (tableName, idKeyName, id) => {
   // querying by id can be used when we are querying a table
   // that has a sortKey, but we don't need to use the sortKey