public async Task <bool> RemoveProjectAttendant(PersonInProjectParameterDto parameters)
        {
            foreach (var personId in parameters.AttendantIds)
            {
                var entity = await personInProjectRepository.GetSingleByCondition(x => x.PersonId == personId &&
                                                                                  x.ProjectId == parameters.ProjectId);

                if (entity != null)
                {
                    await personInProjectRepository.Delete(entity);
                }
            }

            return(await personInProjectRepository.SaveChanges());
        }