IAChat/MSGraph/TokenManager.cs

using Microsoft.Identity.Client;

namespace IAChat.MSGraph
{
    public class TokenManager
    {
        private readonly IConfiguration _configuration;
        private readonly string _tenantId;
        private readonly string _clientId;

        public TokenManager(IConfigurationManager configuration)
        {
            _configuration = configuration;
            _tenantId = _configuration.GetSection("AppTenantId").Value;
            _clientId = _configuration.GetSection("AppClientID").Value;
        }


        public async Task<string> ObterToken(string userEmail)
        {
            // Configuração do contexto de autenticação
            var app = PublicClientApplicationBuilder
                .Create(_clientId)
                .WithAuthority(AzureCloudInstance.AzurePublic, _tenantId)
                .Build();

            // Definir os escopos necessários
            string[] scopes = new string[] {
                "https://graph.microsoft.com/.default",
                "User.Read"
            };

            try
            {
                var result = await app.AcquireTokenInteractive(scopes)
                    .WithLoginHint(userEmail)
                    .ExecuteAsync();

                return result.AccessToken;
            }
            catch (Exception ex)
            {
                // Tratamento de erro
                Console.WriteLine($"Erro ao obter token: {ex.Message}");
                return null;
            }
        }
    }
}