error: autenticação do tipo password falhou para usuário

Criei o banco de dados no pgAdmin. Ao digitar npm run start aparece o seguinte erro:

[Nest] 920  - 24/01/2024, 13:38:54   ERROR [TypeOrmModule] Unable to connect to the database. Retrying (1)...
error: autentica��o do tipo password falhou para usu�rio "root"
    at Parser.parseErrorMessage (C:\Users\anton\angular\loja\node_modules\pg-protocol\src\parser.ts:369:69)
    at Parser.handlePacket (C:\Users\anton\angular\loja\node_modules\pg-protocol\src\parser.ts:188:21)     
    at Parser.parse (C:\Users\anton\angular\loja\node_modules\pg-protocol\src\parser.ts:103:30)
    at Socket.<anonymous> (C:\Users\anton\angular\loja\node_modules\pg-protocol\src\index.ts:7:48)
    at Socket.emit (node:events:511:28)
    at addChunk (node:internal/streams/readable:332:12)
    at readableAddChunk (node:internal/streams/readable:305:9)
    at Socket.Readable.push (node:internal/streams/readable:242:10)
    at TCP.onStreamRead (node:internal/stream_base_commons:190:23)

Eis o meu código

docker-compose.yaml

version: '3.5'
    
    services:
      postgres:
        image: postgres:latest
        environment:
          POSTGRES_USER: ${DB_USERNAME}
          POSTGRES_PASSWORD: ${DB_PASSWORD}
          PGDATA: /data/postgres
        volumes:
          - postgres:/data/postgres
        ports:
          - "5432:5432"
        networks:
          - postgres
        restart: unless-stopped
    
      pgadmin:
        image: dpage/pgadmin4
        environment:
          PGADMIN_DEFAULT_EMAIL: ${DB_ADMIN_EMAIL}
          PGADMIN_DEFAULT_PASSWORD: ${DB_PASSWORD}
        ports:
          - "8081:80"
        depends_on:
          - postgres
        networks:
          - postgres
    
    networks:
      postgres:
        driver: bridge
    
    volumes:
        postgres:

app.module.ts

@Module({
  imports: [
    UsuarioModule, 
    ProdutoModule,
    ConfigModule.forRoot({
      isGlobal: true
    }),
    TypeOrmModule.forRootAsync({
      useClass: DbConfigService,
      inject: [DbConfigService]
    })
  ]
})
export class AppModule {}

db.config.services.ts

@Injectable()
export class DbConfigService implements TypeOrmOptionsFactory {

  constructor(private configService: ConfigService) {}

  createTypeOrmOptions(): TypeOrmModuleOptions | Promise<TypeOrmModuleOptions> {
    return {
      type: "postgres",
      host: this.configService.get<string>('DB_HOST'),
      port: this.configService.get<number>('DB_PORT'),
      username: this.configService.get<string>('DB_USERNAME'),
      password: this.configService.get<string>('DB_PASSWORD'),
      database: this.configService.get<string>('DB_NAME'),
      entities: [],
      synchronize: true
    }
  }
}

.env

DB_HOST=127.0.0.1
DB_PORT=5432
DB_USERNAME=root
DB_PASSWORD=root
DB_NAME=db_loja
DB_ADMIN_EMAIL=admin@root.com