A key can have one or more Verification relationships to the DID depending on the kind of functions it's supposed to perform on the DID's behalf.
We support 4 Verification Relationships:
1. Authentication - Keys with this relationship can only be used for authentication i.e.
一个密钥可以与 DID 具有一个或多个验证关系，具体取决于它应该代表 DID 执行的功能类型。
我们支持 4 种验证关系：
1. 身份验证 - 具有这种关系的密钥只能用于身份验证，即