Issue #2: Create a database table to hold login credentials

Created table ir_login.

HOWTO.html

@@ -66,8 +66,9 @@ <h2> Backup of Database </h2>
 
 <h2> Administrative Work on Database </h2>
 
-<p> To do all administrative work, the user queen@localhost is used.  Since this webapp
-uses only the database <i>kdb</i>, the following command should work. </p>
+<p> To do all administrative work, the user queen@localhost is used.  Since this
+webapp uses only the database <i>kdb</i>, the following command should work.
+</p>
 
 <pre>
   $ mysql -u queen -p kdb
@@ -79,8 +80,13 @@ <h2> Database Tables </h2>
   <li> The table <i>ir_people</i> is used to store information about any person
   who needs to interact with the system. Each person is assigned a unique nick
   name (maximum length of 8 chars). </li>
+  <li> The table <i>ir_login</i> is used to store login credentials of any user
+  who needs access to the iragu application. Only authenticated users can do
+  anything useful. Password is stored as SHA2(password, 256) function of MySQL.
+  </li>
 </ul>
 
+
 <h2> Operations </h2>
 
 <ul>

data-model/kdb-schema.sql

@@ -23,6 +23,23 @@ CREATE DATABASE /*!32312 IF NOT EXISTS*/ `kdb` /*!40100 DEFAULT CHARACTER SET ut
 
 USE `kdb`;
 
+--
+-- Table structure for table `ir_login`
+--
+
+DROP TABLE IF EXISTS `ir_login`;
+/*!40101 SET @saved_cs_client     = @@character_set_client */;
+/*!50503 SET character_set_client = utf8mb4 */;
+CREATE TABLE `ir_login` (
+  `username` char(8) NOT NULL,
+  `token` char(64) NOT NULL,
+  `usertype` enum('CUSTOMER','SERVICE') DEFAULT 'CUSTOMER',
+  `created` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP,
+  PRIMARY KEY (`username`),
+  CONSTRAINT `user_has_nick` FOREIGN KEY (`username`) REFERENCES `ir_people` (`nick`)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci;
+/*!40101 SET character_set_client = @saved_cs_client */;
+
 --
 -- Table structure for table `ir_people`
 --
@@ -52,4 +69,4 @@ CREATE TABLE `ir_people` (
 /*!40101 SET COLLATION_CONNECTION=@OLD_COLLATION_CONNECTION */;
 /*!40111 SET SQL_NOTES=@OLD_SQL_NOTES */;
 
--- Dump completed on 2022-02-16 22:09:07
+-- Dump completed on 2022-02-17 19:26:10