added nonce creattion

app/Models/Nonce.ts

@@ -0,0 +1,29 @@
+import { DateTime } from 'luxon'
+import { BaseModel, beforeCreate, column } from '@ioc:Adonis/Lucid/Orm'
+import { v4 as uuidv4 } from 'uuid'
+
+export default class Nonce extends BaseModel {
+	public static selfAssignPrimaryKey = true
+
+	@column.dateTime({ autoCreate: true })
+	public createdAt: DateTime
+
+	@column.dateTime({ autoCreate: true, autoUpdate: true })
+	public updatedAt: DateTime
+
+	@column.dateTime()
+	public expiryDate : DateTime;
+
+  	@column()
+	public nonce : string;
+
+	@column({isPrimary: true})
+	public requestId: string;
+
+	@beforeCreate()
+	public static generateNonce( nonce : Nonce) {
+		nonce.nonce = uuidv4()
+		nonce.expiryDate = DateTime.now().plus({minutes: 10})
+	}
+
+}