Implement user constructor

lib/User.js

@@ -1,5 +1,7 @@
 'use strict';
 
+const DatabaseConnectionPool = require('./DatabaseConnectionPool');
+
 class User {
 	id;
 	firstName;
@@ -10,7 +12,30 @@ class User {
 	type = null;
 
 	constructor(type, userId) {
+		const sql = `
+			select
+				email,
+				firstName,
+				otherNames,
+				lastName,
+				password,
+				accountId as id
+			from ${type}
+			where
+				${type}Id = ?;
+		`;
 
+		this.type = type;
+
+		return (async () => {
+			const conn = await new DatabaseConnectionPool();
+			const record = await conn.runQuery(sql, [ userId ]);
+
+			for (const [ k, v ] of Object.entries(record[0]))
+				this[k] = v;
+
+			return this;
+		})();
 	}
 
 	get fullName() {