feat: add admin tests read and update endpoints

src/modules/otp/entities/otp.entity.ts

@@ -11,7 +11,7 @@ import {
 @Index(['phone', 'used'])
 export class OTP {
   @PrimaryGeneratedColumn()
-  id: number;
+  id!: number;
 
   @Index()
   @Column({
@@ -19,23 +19,23 @@ export class OTP {
     length: 11,
     nullable: false,
   })
-  phone: string;
+  phone!: string;
 
   @Column({
     type: 'varchar',
     nullable: false,
   })
-  code: string;
+  code!: string;
 
   @CreateDateColumn()
-  createdAt: Date;
+  createdAt!: Date;
 
   @Index()
   @Column({ type: 'timestamptz' })
-  expiresAt: Date;
+  expiresAt!: Date;
 
   @Column({ type: 'boolean', default: false })
-  used: boolean;
+  used!: boolean;
 
   @BeforeInsert()
   setExpiry() {