19 #import <Foundation/Foundation.h> NSString *const OIDGrantTypeClientCredentials
For obtaining an access token from the token endpoint using client credentials.
NSString *const OIDGrantTypeAuthorizationCode
For exchanging an authorization code for an access token.
NSString *const OIDGrantTypeRefreshToken
For refreshing an access token with a refresh token.
NSString *const OIDGrantTypePassword
For obtaining an access token with a username and password.