applied transformation on username for login

src/users/dto/create-user.dto.ts

@@ -1,9 +1,11 @@
 import {IsNotEmpty, IsString } from 'class-validator';
 import { ApiProperty } from '@nestjs/swagger';
+import { Transform } from 'class-transformer';
 
 export class CreateUserDto {
   @ApiProperty({ example: 'Jane Doe', description: 'Full name of the user' })
   @IsNotEmpty()
   @IsString()
+  @Transform(({value})=>value?.trim().toLowerCase())
   name!: string;
 }