private static void RemoveExistingUserRoles(string userId, AdminAppIdentityDbContext dbContext)
{
var existingUserRoles =
dbContext.Set <IdentityUserRole>().Where(x => x.UserId == userId);
if (existingUserRoles.Any())
{
dbContext.Set <IdentityUserRole>().RemoveRange(existingUserRoles);
}
dbContext.SaveChanges();
}