Fix counter error in arrayList

src/main/java/CredentialRepository.java

@@ -2,7 +2,7 @@ import java.util.ArrayList;
 
 public class CredentialRepository implements CredentialRepositoryInterface{
 
-    private int idCounter = 1;
+    private int idCounter = 0;
     private ArrayList<Credential> credentials;
 
     public CredentialRepository()

src/test/java/CredentialRepositoryTest.java

@@ -36,7 +36,7 @@ class CredentialRepositoryTest {
         this.credentialRepository.createNewCredential("mock", "mock");
         this.credentialRepository.createNewCredential("kek", "mate");
 
-        Credential c = this.credentialRepository.getCredentialsViaId(2);
+        Credential c = this.credentialRepository.getCredentialsViaId(1);
         Assertions.assertEquals("mate", c.getPassword());
     }