1.3. 授权许可 （1.3. Authorization Grant）

1.3. 授权许可

授权许可是一个代表资源所有者授权（访问受保护资源）的凭据，客户端用它来获取访问令牌。本规范定义了四种许可类型——授权码、隐式许可、资源所有者密码凭据和客户端凭据——以及用于定义其他类型的可扩展性机制。

1.3. Authorization Grant

   An authorization grant is a credential representing the resource
   owner's authorization (to access its protected resources) used by the
   client to obtain an access token.  This specification defines four
   grant types -- authorization code, implicit, resource owner password
   credentials, and client credentials -- as well as an extensibility
   mechanism for defining additional types.