feat: implement token generation and issuing on successful login

src/FiscalOS.API/Login/JwtOptions.cs

@@ -0,0 +1,27 @@
+using Microsoft.Extensions.Options;
+
+namespace FiscalOS.API.Login;
+
+internal sealed record JwtOptions
+{
+  public string Issuer { get; init; } = string.Empty;
+  public string Audience { get; init; } = string.Empty;
+  public string Secret { get; init; } = string.Empty;
+  public int ExpiryInMinutes { get; init; } = 5;
+}
+
+internal sealed record JwtOptionsSetup : IConfigureOptions<JwtOptions>
+{
+  private const string SectionName = nameof(JwtOptions);
+  private readonly IConfiguration _configuration;
+
+  public JwtOptionsSetup(IConfiguration configuration)
+  {
+    _configuration = configuration;
+  }
+
+  public void Configure(JwtOptions options)
+  {
+    _configuration.GetSection(SectionName).Bind(options);
+  }
+}