Fix issue with missing configuration for Facebook or Google

src/Infrastructure/Identity/IdentityService.cs

@@ -218,12 +218,15 @@ public class IdentityService(
         {
             return null;
         }
-
+        
         var user = await GetUserByUserNameAsync(userName);
+        
+        var jwtSection = configuration.GetRequiredSection("Authentication:Jwt");
+        
         var token = JwtTokenHelper.GenerateJwtToken(
-            issuer: configuration["Jwt-Issuer"] ?? "",
-            audience: configuration["Jwt-Audience"] ?? "",
-            key: configuration["Jwt-Key"] ?? "",
+            issuer: jwtSection["Issuer"] ?? "",
+            audience: jwtSection["Audience"] ?? "",
+            key: jwtSection["Key"] ?? "",
             userId: user?.Id ?? "");
 
         return token;