django.core.exceptions.ImproperlyConfigured: 'dj_db_conn_pool.backends.mysql' isn't an available database backend or couldn't be imported. Check the above exception. To use on
e of the built-in backends, use 'django.db.backends.XXX', where XXX is one of:
django.core.exceptions.ImproperlyConfigured: 'dj_db_conn_pool.backends.mysql' isn't an available database backend or couldn't be imported. Check the above exception. To use on e of the built-in backends, use 'django.db.backends.XXX', where XXX is one of: