input: Write a python function to parse the DATABASES dictionary and return the name of the database.
  assert get_database_name() == 'fileManagerDB'
output: def get_database_name():
      DATABASES = {
          'default': {
              'ENGINE': 'django.db.backends.sqlite3',
              'NAME': 'fileManagerDB',
          }
      }
      return DATABASES['default']['NAME']