public async Task <Data.Models.RolePermission> Create(int roleId, int permissionId)
        {
            var rolePermission = new Data.Models.RolePermission
            {
                RoleId       = roleId,
                PermissionId = permissionId
            };

            _db.RolePermissions.Add(rolePermission);
            await _db.SaveChangesAsync();

            return(rolePermission);
        }
 public async Task Delete(Data.Models.RolePermission rolePermission)
 {
     _db.RolePermissions.Remove(rolePermission);
     await _db.SaveChangesAsync();
 }