Implements function for Password Update

src/main/java/CredentialRepository.java

@@ -63,7 +63,7 @@ public class CredentialRepository implements CredentialRepositoryInterface{
     public void updatePassword(int index, String newPassword) {
 
         try{
-
+            this.credentials.get(index).upDatePassword(newPassword);
         }
         catch (IndexOutOfBoundsException outOfBoundsException)
         {