1. use [staticcheck](https://staticcheck.io/) to check the code, and fix some issues. 2. use `go fmt` to format the code. 3. use `go mod tidy` clean the go mod.
1. use [staticcheck](https://staticcheck.io/) to check the code, and fix some issues. 2. use `go fmt` to format the code. 3. use `go mod tidy` clean the go mod.