Changed the c.MustBindWith() -> c.ShouldBindWith().

A Util function to generate jwt_token which can be used in the request header.

Using this function to get a connection, you can create your connection pool here.

Opening a database and save the reference to `Database` struct.

Warp the error info in a object.

To handle the error returned by c.Bind in gin framework https://github.com/go-playground/validator/blob/v9/_examples/translations/main.go.

A helper function to generate random string.

Delete the database after running testing cases.

This function will create a temporarily database for running testing cases.

Keep this two config private, it should not expose to open source.

My own Error type that will help return my customized Error info {"database": {"hello":"no such table", error: "not_exists"}}.