refactoring

api/Services/PersonService.cs

@@ -48,20 +48,24 @@ namespace api.Services
 
             await personExists(username);
 
-            Person updatedPerson = Person.Create(username: personDto.Username, realName: personDto.RealName, birthday: personDto.Birthday);
+            Person updatedPerson = Person.Create(username: username, realName: personDto.RealName, birthday: personDto.Birthday);
             await _personRepository.UpdateAsync(updatedPerson);
         }
 
         public async Task DeletePersonAsync(string username)
         {
             await personExists(username);
+
+            await _personRepository.DeleteAsync(username);
         }
 
         private async Task<Person> personExists(string username)
         {
+            username = Person.NormalizeUsername(username);
+
             Person? person = await _personRepository.GetByUsernameAsync(username);
             
-            if (person == null) throw new KeyNotFoundException("Person not found");
+            if (person == null) throw new KeyNotFoundException($"Person '{username}' not found");
 
             return person;
         }