Initial commit

src/systemData/userCredentials.js

@@ -0,0 +1,9 @@
+function UserCredentials(username, password) {
+  if (!username || username === '') throw new TypeError("username must be a non-empty string.");
+  if (!password || password === '') throw new TypeError("password must be a non-empty string.");
+
+  this.username = username;
+  this.password = password;
+}
+
+module.exports = UserCredentials;