Postgres Server Error 500

Question

I'm using django 1.9,gunicorn,nginx and postgres as database for my website. My site is up and running but when i try to login as admin or user i get server error 500 on webpage and on terminal i get "is the server running on host 139.59.45.246 and accepting tcp/ip connections on port 5432".

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I thought there might be a problem in postgres.conf and pg_hba.conf. But there are 2 host all all....one for IPv4 and one for IPv6 in pg_hba.conf.

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I can't figure out how to edit pg_hba.conf. Please use above's IP to explain.

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One more thing will it solve the problem or i might need to do something else?

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Here my settings.py-

import os

BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))

SECRET_KEY = '^4z+c_2^di81mt7sj@e8c&_b%###############'

DEBUG = False

ALLOWED_HOSTS = ['irenovate.in', '139.59.45.246']

INSTALLED_APPS = [
    # django apps
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',

    # my apps
    'website',
    'accounts',

    # third party apps
    'crispy_forms',
]

MIDDLEWARE_CLASSES = [
    'django.middleware.security.SecurityMiddleware',
    'django.contrib.sessions.middleware.SessionMiddleware',
    'django.middleware.common.CommonMiddleware',
    'django.middleware.csrf.CsrfViewMiddleware',
    'django.contrib.auth.middleware.AuthenticationMiddleware',
    'django.contrib.auth.middleware.SessionAuthenticationMiddleware',
    'django.contrib.messages.middleware.MessageMiddleware',
    'django.middleware.clickjacking.XFrameOptionsMiddleware',
]

ROOT_URLCONF = 'irenovate.urls'

TEMPLATES = [
    {
        'BACKEND': 'django.template.backends.django.DjangoTemplates',
        'DIRS': [os.path.join(BASE_DIR, "templates")],
        'APP_DIRS': True,
        'OPTIONS': {
            'context_processors': [
                'django.template.context_processors.debug',
                'django.template.context_processors.request',
                'django.contrib.auth.context_processors.auth',
                'django.contrib.messages.context_processors.messages',
            ],
        },
    },
]

WSGI_APPLICATION = 'irenovate.wsgi.application'


# Database

DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.postgresql_psycopg2',
        'NAME': '########',
        'USER': '########',
        'PASSWORD': '........',
        'HOST': '139.59.45.246',
        'PORT': '',
    }
}

LANGUAGE_CODE = 'en-us'

TIME_ZONE = 'UTC'

USE_I18N = True

USE_L10N = True

USE_TZ = True

STATIC_URL = '/static/'

STATIC_ROOT = os.path.join(os.path.dirname(BASE_DIR), "static_in_env", "static")

STATICFILES_DIRS = (
    os.path.join(BASE_DIR, "static_in_project", "our_static"),
)

MEDIA_URL = '/media/'
MEDIA_ROOT = os.path.join(os.path.dirname(BASE_DIR), "static_in_env", "media_root")

CRISPY_TEMPLATE_PACK = 'bootstrap3'