added credential menu item show credential

src/main/java/Vault.java

@@ -140,6 +140,8 @@ public class Vault implements VaultInterface {
             credentialM = false;
         } else if (input.equals("a")) {
             println("Type username:");
+        } else if (input.equals("c")) {
+            println("Type username or ID to show credential:");
         }
     }
 }

src/test/java/VaultTest.java

@@ -53,6 +53,15 @@ public class VaultTest {
         assertTrue(outputStream.toString().contains("Type"));
     }
 
+    @Test
+    void openShowCredentialMenuItem() {
+        ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
+        vlt.inputS = new ByteArrayInputStream("c".getBytes(StandardCharsets.UTF_8));
+        vlt.outputS = outputStream;
+        vlt.credentialMenu();
+        assertTrue(outputStream.toString().contains("Type"));
+    }
+
     @Test
     void addCredentialTest() { vlt.addCredential();}