报错“规则不存在错误”，怎么办？

如何修复下面的错误，我正在尝试使用 NestJS 连接到 postgres 数据库。我在 .env 文件中注册了一个 postgres 用户，不是我的 linux 帐户的名称，但他正在尝试连接到我的 linux 帐户。尽管如此，在 Postgres 中，我创建了“Stell”角色并授予了超级用户权限。请帮忙

    [[Nest] 18553 - 01.05.2023, 22:07:19 ERROR [Exception Handler] role "Stell" does not exist
error: role "Stell" does not exist
    in Parser.parser Error message (/home/Steel/Documents/WebStormProject/spotify/backend/node_modules/pg-protocol/src/parser.ts:369:69)
in Parser.handlePacket (/home/Steel/Documents/WebStormProject/spotify/backend/node_modules/pg-protocol/src/parser.ts:188:21)
in Parser.parse (/home/Steel/Documents/WebStormProject/spotify/backend/node_modules/pg-protocol/src/parser.ts:103:30)
    in the socket.<anonymous> (/home/Steel/Documents/WebStormProject/spotify/backend/node_modules/pg-protocol/src/index.ts:7:48)
in Socket.emit (node:events:513:28)
in addChunk (node:internal/threads/readable:324:12)
in readableAddChunk (node:internal/streams/readable:297:9)
in the socket.Readable.push (node:internal/streams/readable:234:10)
when reading TCP.on Stream (node:internal/stream_base_commons:190:23)

typeorm.module.ts

    import { Module } from '@nestjs/common';
import { TypeOrmModule as NestTypeOrmModule } from '@nestjs/typeorm';

@Module({
    imports: [
        NestTypeOrmModule.forRoot({
            type: 'postgres',
            host: process.env.DB_HOST,
            port: Number(process.env.DB_PORT),
            username: process.env.DB_USERNAME,
            password: process.env.DB_PASSWORD,
            database: process.env.DB_DATABASE,
            entities: ['dist/entities/**/*.entity.js'],
            synchronize: true,
        }),
    ],
})
export class TypeOrmModule {}