得到一个与所需范围相匹配，且已认证的 session。 如果插件开发者提供的 providerId 没有注册，或者用户不同意与此插件共享身份认证信息，则调用失败。 如果有多个具有相同作用域的 session，则会向用户提供选择入口，让用户选择他们想要使用的账号。
目前，只有两个已认证身份，它们是由实现 Github 认证插件和 Microsoft 认证插件的开发者贡献的：providerId 是 'github' 和 'microsoft'
要使用的开发者 id
代表所请求权限的范围列表。它们由 providerId 决定
需要使用 {@link GetSessionOptions}
返回 thenable，解析为已认证身份的 session
Get an authentication session matching the desired scopes. Rejects if a provider with providerId is not registered, or if the user does not consent to sharing authentication information with the extension. If there are multiple sessions with the same scopes, the user will be shown a quickpick to select which account they would like to use.
Currently, there are only two authentication providers that are contributed from built in extensions to the editor that implement GitHub and Microsoft authentication: their providerId's are 'github' and 'microsoft'.
The id of the provider to use
A list of scopes representing the permissions requested. These are dependent on the authentication provider
The {@link GetSessionOptions} to use
A thenable that resolves to an authentication session if available, or undefined if there are no sessions
An Event which fires when the authentication sessions of an authentication provider have been added, removed, or changed.
Register an authentication provider.
There can only be one provider per id and an error is being thrown when an id has already been used by another provider. Ids are case-sensitive.
The unique identifier of the provider.
The human-readable name of the provider.
The authentication provider provider.
A Disposable that unregisters this provider when being disposed.
用于校验身份的命名空间
@cxk0831