The Test Case Structure would be something like this below:
Test Case ID | Test Condition | Expected Result | Actual Result | Status
You have specified the Input condition in your case, but there is no Expected Results.
Many GUI login entries have both ID and pass work entered at the same time. In most cases the software doesn't know where to look for a pass word if the ID (that uses the pass word) isn't correct. I have many times incorrectly entered my ID and entered the pass word correctly and receive an error message. Incorrect Id and correct pass word could be a valid test.