Fix: Added fix for None discriptive error issue #36

Updated signUp.spec.ts to use new fixture
Updated Account information variable names
Deleted "deleteUserFixture.ts" as it was incorporated into the "base.ts" file

tests/e2e/web/pages/signUpPage.ts

@@ -733,3 +733,8 @@ export class SignUpPage {
     await expect(this.usernameError).toBeVisible()
   }
 }
+
+  async verifyUsernameError() {
+    await expect(this.usernameError).toBeVisible()
+  }
+}