How to find a city by coordinates in GeoDjango?

Question

Django

There is the following task: there is a model / table of cities, fields: the name and coordinates of the city boundaries and the user's coordinates. What type of field from geodjango should be used to save the boundaries of the city and how to determine which city the coordinates belong to by the user's coordinates? If possible, please provide an example. It seems that MultiPolygonField should be suitable for preserving the boundaries of the city, but I'm not sure.