Backend Pacients, Doctors and MedicalHistory endpoints

- added for Pacients:
POST: /register
POST: /login
POST: /reset_password
PUT: /profile
DELETE: /profile

- added for Doctors:
POST: /register
POST: /login
POST: /reset_password
PUT: /profile
DELETE: /profile

- added for MedicalHistories:
POST: /:id (only by pacient) - done
GET: /:id (only by pacient) - done
PUT: /:id (only by doctor) - done
PUT /grand_access - TODO

backend/Infrastructure/Services/PostgreSQL/MedicalHistoryRepository.cs

@@ -1,14 +1,17 @@
 using Application.Services.Database;
 using Core.Entities;
 using Infrastructure.Data;
+using Microsoft.EntityFrameworkCore;
 
-namespace Infrastructure.Services.PostgreSQL
+namespace Infrastructure.Services.PostgreSQL;
+
+public class MedicalHistoryRepository : BasePostgreSQLRepository<MedicalHistory>, IMedicalHistoryRepository
 {
-    public class MedicalHistoryRepository : BasePostgreSQLRepository<MedicalHistory>, IMedicalHistoryRepository
+    public MedicalHistoryRepository(HealthcareManagerDatabase context) : base(context)
     {
-        public MedicalHistoryRepository(HealthcareManagerDatabase context) : base(context)
-        {
-        }
-
     }
+
+    public async Task<MedicalHistory?> GetByUserIdAsync(Guid userId)
+        => await _context.MedicalHistories.FirstOrDefaultAsync(d => d.UserId == userId);
+
 }