I cant debug test data

I tested Data is passed, but when use “” or “” in content post data, it have error

Sliced 0979701606:123456 into:

USER: 0979701606

PASS: 123456

[IDLE] CompilationErrorException: (3,90): error CS0103: The name ‘USER’ does not exist in the current context

BOT ENDED AFTER 182 ms WITH STATUS: ERROR