Documents settings.py for python-spanner-django

DATABASES = {
    'default': {
        'ENGINE': 'django_spanner',
        'PROJECT': '<GCP_project_id>',
        'INSTANCE': '<instance_id>',
        'NAME': '<database_name>',
        'OPTIONS': {
            'credentials_uri': '<credentials_uri>',
        },
    },
}

TypeError: connect() got an unexpected keyword argument 'credentials_uri'

Reference issue : googleapis/python-spanner-django#582

The paramter credentials_uri was there when db_api is part of python-spanner-django, but it removed or replaced by credentials parameter when it moved to python-spanner.