public async Task <HttpResponseMessage> CreateRoleAssignment(int projectId, [FromBody] RoleAssignmentDTO roleAssignment) { if (roleAssignment == null) { throw new BadRequestException(ErrorMessages.ModelIsEmpty, ErrorCodes.BadRequest); } await _privilegesManager.DemandAny(Session.UserId, projectId, InstanceAdminPrivileges.AccessAllProjectsAdmin, ProjectAdminPrivileges.ManageGroupsAndRoles); RoleAssignmentValidator.ValidateModel(roleAssignment); var createdRoleAssignmentId = await _instanceRepository.CreateRoleAssignmentAsync(projectId, roleAssignment); return(Request.CreateResponse(HttpStatusCode.Created, createdRoleAssignmentId)); }