test: add createUser test and add account test

[ucmazmehmet]

• test: createUser Test and account test

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• comment this code-bloc, because login and authorities wrong set.

 //TODO this code-bloc not working in unit-test
    // final cacheStorage = getStorageCache;
    // String username = cacheStorage["username"] ?? '';
    // if (endpoint.startsWith('/account') || endpoint.startsWith('/users')) {
    //   try {
    //     var responseJson = json.decode(responseBody);
    //     responseJson['login'] = username;
    //     responseJson['authorities'] = ['ROLE_${username.toUpperCase()}'];
    //     response = Future.value(http.Response(json.encode(responseJson), httpStatusCode));
    //   } catch (e) {
    //     debugPrint("There is no response body to update with username");
    //   }

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• phoneNumber is commented, because phoneNumber is not using in account screen
• add key in create_form_widget fields

[cevheri]

Thanks