I am facing problem in connection pgbouncer with postgresql in django

Question

for the configuration of pgbouncer with postgresql in pgbouncer.ini file i have done

mydb= dbname=mydb host=**.**.**.** port=5432
listen_addr = *
listen_port = 6432

unix_socket_dir = /var/run/postgresql

then in userlist.txt file i have

"usr" "pass"

then in django settings.py

DATABASES = {
    'default':
 {
    'ENGINE': 'django.db.backends.postgresql_psycopg2',
    'NAME': 'mydb', #its db name
    'USER':'usr', #it's my user name of database
    'PASSWORD': 'pass', #it's my password of database
    'HOST': 'localhost', #it's my host of database

 }
}

but when i started gunicorn server then in status it is giving me an error that Mar 20 07:35:27 testenv gunicorn[288076]: FATAL: password authentication failed for user "usr"

I tried to configure pgbouncer with postgresql to solve the problem of max_connection_pooling but it is constantly giving the same error when i'm tried to start the gunicorn server.

I'm expecting to solve

django.db.utils.OperationalError: FATAL: remaining connection slots are reserved for non-replication superuser connections