text: import json
  import os
  
  from passlib.hash import pbkdf2_sha256
  import datetime
  from models.user import UserModel
  from factories.response_factory import success_response, err_response
  
  from flask import request
  from flask_restful import Resource, reqparse
  from models import model_helpers
  from schemas.schemas import UserSchema, UpdateUserSchema, ErrorSchema, SuccessSchema
  from flask_restful_swagger_2 import swagger
  from utils.logging import log_event
  
  class User(Resource):
      @swagger.doc({
          'tags': ['user'],
          'description': 'Returns a user',
          'parameters': [
              {
                  'name': 'user_id',
                  'description': 'User identifier',
                  'in': 'path',
                  'type': 'integer'
              }
          ],
          'responses': {
              '200': {
                  'description': 'User response',
                  'schema': UserSchema,
                  'examples': {
                      'application/json': {
                          'uuid': 'b8b54ffa-18c4-4910-9212-8e6c8a25aed',
                          'email': 'someone@mail.com',
                          'firstName': 'Joe',
                          'lastName': 'Johnson',
                          'accessToken': '1733b7d2-94db-4e73-8165-35ae448a1f59',
                          'refreshToken': '2986d84a-9e17-46db-8580-0c96747d17f0',
                          'verified': False,
                      }
                  }
              },
              '404': {
                  'description': 'User does not exist response',
                  'schema': ErrorSchema,
                  'examples': {
                      'application/json': {
                          'error': True,
                          'message': 'User does not exist'
                      }
                  }
              },
              '500': {
                  'description': 'Error getting user',
                  'schema': ErrorSchema,
                  'examples': {
                      'application/json': {
                          'error': True,
                          'message': 'Error getting user'
                      }
                  }
              }
          }
       })
      def get(self, user_id):
          log_event(f"GET: /users/{user_id}")
          try:
              user = UserModel.get(user_id, attributes_to_get=['uuid', 'accessToken', 'refreshToken', 'email', 'firstName', 'lastName'])
              user = model_helpers.model_to_dict(user)
              return success_response(user)
          except UserModel.DoesNotExist:
              return err_response('User does not exist', 404)
          except Exception:
              return err_response('Error getting user', 500)
  
      @swagger.doc({
          'tags': ['user'],
          'description': 'Updates a user',
          'parameters': [
              {
                  'name': 'user_id',
                  'description': 'User identifier',
                  'in': 'path',
                  'type': 'integer'
              },
              {
                  'name': 'user',
                  'description': 'Fields that the user is allowed to update',
                  'in': 'body',
                  'schema': UpdateUserSchema
              }
          ],
          'responses': {
              '200': {
                  'description': 'User updated response',
                  'schema': SuccessSchema,
                  'examples': {
                      'application/json': {
                          'message': 'Succesfully updated user'
                      }
                  }
              },
              '400': {
                  'description': 'User does not exist response',
                  'schema': ErrorSchema,
                  'examples': {
                      'application/json': {
                          'error': True,
                          'message': 'Invalid email'
                      }
                  }
              }
          }
       })
      
      def patch(self, user_id):
          log_event(f"PATCH: /users/{user_id}")
          body = request.get_json(force=True)
          user = UserModel.get(user_id)
          for item in body:
              try:
                  user.update_item(attribute=item, value=body[item], action='PUT')
                  user.update_item(attribute='updated_at', value=datetime.datetime.utcnow().isoformat(), action='PUT')
              except Exception as e:
                  return err_response(e, 400)
          return success_response({'message': 'Successfully updated user'})
  