Fix `amount` cmd in case `--gtest` is passed
### Problem
```python
# silkaj/money.py
def cmd_amount
if not cli_args.subsubcmd.startswith("--"):
```
Previous condition is here to separate authentication methods from pubkeys passed as arguments.
But, if we pass `--gtest` option, we are asked with an authentication method.
### Solution
- condition `--auth-`
issue