// GET: AspNetUserRoles/Create
public void CreateUserRole(String userId, String roleId)
{
AspNetUserRoles userRole;
_context.AspNetUserRoles.Add(userRole = new AspNetUserRoles {
UserId = _context.AspNetUsers.Where(r => r.Id == userId).FirstOrDefault().Id,
RoleId = _context.AspNetRoles.Where(r => r.Id == roleId).FirstOrDefault().Id
});
_context.SaveChanges();
}