private static async Task SeedRoleDataAsync(RoleManager <Role> roleManager)
{
var data = InitializeData.BuildRoleList();
var dbData = roleManager.Roles.ToList();
var diffData = data.Where(c => dbData.All(e => e.Name != c.Name)).ToList();
foreach (var role in diffData)
{
await roleManager.CreateAsync(role).ConfigureAwait(false);
}
}
