refactor(ConsumerApiService): Schnittstelle zum Lesen von ConsumerApi und zum Überprüfen der Passwörter erstellt.

- Implementiert als ConsumerApiJsonBasedService, um Daten aus einer json-Datei zu lesen.

src/DigitalData.Auth.API/Services/ConsumerApiJsonBasedService.cs

@@ -0,0 +1,19 @@
+using DigitalData.Auth.API.Dto;
+using DigitalData.Auth.API.Services.Contracts;
+using Microsoft.Extensions.Options;
+
+namespace DigitalData.Auth.API.Services
+{
+    public class ConsumerApiJsonBasedService : IConsumerApiService
+    {
+        private readonly IEnumerable<ConsumerApi> _consumerAPIs;
+        public ConsumerApiJsonBasedService(IOptions<IEnumerable<ConsumerApi>> options)
+        {
+            _consumerAPIs = options.Value;
+        }
+
+        public Task<ConsumerApi?> ReadByNameAsync(string name) => Task.Run(() => _consumerAPIs.FirstOrDefault(api => api.Name == name));
+
+        public async Task<bool> VerifyAsync(ConsumerApiLogin login, string password) => (await ReadByNameAsync(login.Name))?.Password == password;
+    }
+}

src/DigitalData.Auth.API/Services/Contracts/IConsumerApiService.cs

@@ -0,0 +1,11 @@
+using DigitalData.Auth.API.Dto;
+
+namespace DigitalData.Auth.API.Services.Contracts
+{
+    public interface IConsumerApiService
+    {
+        public Task<ConsumerApi?> ReadByNameAsync(string name);
+
+        public Task<bool> VerifyAsync(ConsumerApiLogin login, string password);
+    }
+}