Postgres container password authentication failed for user "admin"

I am building a microservices application using Spring Boot, and I am running two distinct postgres containers on docker for two of the microservices running on my local machine (Windows 10). The docker-compose.yml file is as follows:

services:
  notification-postgres:
    container_name: notification-postgres
    image: postgres
    environment:
      POSTGRES_DB: notification_service_db
      POSTGRES_USER: admin
      POSTGRES_PASSWORD: admin123
      PGDATA: /var/lib/postgresql/data
    volumes:
      - notification-postgres:/var/lib/postgresql/data
    ports:
      - "5432:5432"
    restart: unless-stopped

  auth-postgres:
    container_name: auth-postgres
    image: postgres
    environment:
      POSTGRES_DB: auth_service_db
      POSTGRES_USER: admin
      POSTGRES_PASSWORD: admin123
      PGDATA: /var/lib/postgresql/data
    volumes:
      - auth-postgres:/var/lib/postgresql/data
    ports:
      - "5431:5431"
    expose:
      - 5431
    command: -p 5431
    restart: unless-stopped

volumes:
  notification-postgres:
  auth-postgres:

The application.yml for notification service is as follows:

spring:
  datasource:
    url: jdbc:postgresql://localhost:5432/notification_service_db
    username: admin
    password: admin123
    driver-class-name: org.postgresql.Driver
  jpa:
    hibernate:
      ddl-auto: update

The application.yml for atuh service is as follows:

spring:
  datasource:
    url: jdbc:postgresql://localhost:5431/auth_service_db
    username: admin
    password: admin123
    driver-class-name: org.postgresql.Driver

  jpa:
    hibernate:
      ddl-auto: update

I was able to connect to notification-postgres from my IDE (IntelliJ IDEA) by stopping the postgres.exe service (as instructed here), which is installed in my local machine.

But, as for the auth-postgres, which runs on ports "5431:5431", I am getting the following error: org.postgresql.util.PSQLException: FATAL: password authentication failed for user "admin"

However, I am able to connect to it using psql, and it is working fine. Here are some logs:
docker logs auth-postgres:

...
2025-08-04 12:12:36.349 UTC [1] LOG:  starting PostgreSQL 17.5 (Debian 17.5-1.pgdg120+1) on x86_64-pc-linux-gnu, compiled by gcc (Debian 12.2.0-14) 12.2.0, 64-bit
2025-08-04 12:12:36.350 UTC [1] LOG:  listening on IPv4 address "0.0.0.0", port 5431
2025-08-04 12:12:36.350 UTC [1] LOG:  listening on IPv6 address "::", port 5431
2025-08-04 12:12:36.354 UTC [1] LOG:  listening on Unix socket

Overall, I cannot connect to multiple postgres containers with my IDE. If anyone knows how to fix the issue, your solutions are welcome.