'ErrorController.Unauthorized()' hides inherited member 'ControllerBase.Unauthorized()'. To make the current member override that implementation, add the override keyword. Otherwise add the new keyword.

'ErrorController.NotFound()' hides inherited member 'ControllerBase.NotFound()'. To make the current member override that implementation, add the override keyword. Otherwise add the new keyword.

This async method lacks 'await' operators and will run synchronously. Consider using the 'await' operator to await non-blocking API calls, or 'await Task.Run(...)' to do CPU-bound work on a background thread.

Possible null reference argument for parameter 'source' in 'IEnumerable<<anonymous type: int Id, string OperatorName, string DriverName, double? OilAmount, DateTime? Date, string Comments, string Status>> Enumerable.Select<OperatorReviewDto, <anonymous type: int Id, string OperatorName, string DriverName, double? OilAmount, DateTime? Date, string Comments, string Status>>(IEnumerable<OperatorReviewDto> source, Func<OperatorReviewDto, <anonymous type: int Id, string OperatorName, string DriverName, double? OilAmount, DateTime? Date, string Comments, string Status>> selector)'.

Possible null reference argument for parameter 'source' in 'OperatorDto? Enumerable.FirstOrDefault<OperatorDto>(IEnumerable<OperatorDto> source)'.

Dereference of a possibly null reference.

Possible null reference argument for parameter 'source' in 'IEnumerable<int> Enumerable.Select<MechanicHandoverDto, int>(IEnumerable<MechanicHandoverDto> source, Func<MechanicHandoverDto, int> selector)'.

Possible null reference argument for parameter 'source' in 'IEnumerable<int> Enumerable.Select<OperatorReviewDto, int>(IEnumerable<OperatorReviewDto> source, Func<OperatorReviewDto, int> selector)'.

Possible null reference argument for parameter 'source' in 'MechanicHandoverDto? Enumerable.FirstOrDefault<MechanicHandoverDto>(IEnumerable<MechanicHandoverDto> source, Func<MechanicHandoverDto, bool> predicate)'.