查询用户余额(Get The Balance)

There are two types of balances: one is the total balance, which is shared across all endpoints; the other is the remaining available count (generally used for test, gifts or compensation), which is specific to a certain endpoint. For example, if an account has a balance of 100 yuan and endpoint A has 1000 remaining uses, when endpoints A is used, it will first consume the remaining uses in the endpoint, and then consume the total balance.
余额有两种，一个是总余额，所有接口共用；另一种是剩余可用次数（一般为测试、赠送、补偿所用），针对某个接口。举个例子：账户有100块余额，且接口A剩余1000次可用次数，调用接口A后，会优先消耗接口中剩余的可用次数，然后在消耗总余额。