how to resolve (1045, "Access denied for user 'User'@'IP or host' (using password: YES)") when build django docker container?

Well, I have multiple databases in django project. One is default and second istest_dev. i have created docker container. and then everything went well till building the container. after that When I try to call my django app api which is using test_dev db for reading data. I have encountered:

OperationalError at /api/projects/

(1045, "Access denied for user 'test_dev'@'xxx.xxx.xxx.xxx' (using password: YES)") 

In settings file, my databases configuration:

{
    'default': {
        'ENGINE': 'django.db.backends.sqlite3',
        'NAME': Path(__file__).resolve().parent.parent / 'db.sqlite3',
    },
    "test_dev" : {
        'ENGINE': 'django.db.backends.mysql',
        'NAME': "test",
        'USER': 'test_dev',
        'PASSWORD': 'db_password',
        'HOST': '?=hosted_domain',
        'PORT': '3306',
        'SSL': True
        }
}

If you know any solution. Please help me out of this. Soon I have to put things on production..

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