Creates Testclass for CredentialRepository

Adds basic layout and @beforeAll setup function

src/test/java/CredentialRepositoryTest.java

@@ -0,0 +1,22 @@
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+class CredentialRepositoryTest {
+
+
+    private CredentialRepository credentialRepository;
+
+    @BeforeEach
+    public void setUp()
+    {
+        credentialRepository = new CredentialRepository();
+    }
+
+    @Test
+    void createNewCredentialAndAddToList() {
+
+
+
+    }
+
+}