NSURL *baseURL = [NSURL URLWithString:@"http://example.com/"]; AFOAuth2Manager *OAuth2Manager = [[AFOAuth2Manager alloc] initWithBaseURL:baseURL clientID:kClientID secret:kClientSecret]; [OAuth2Manager authenticateUsingOAuthWithURLString:@"/oauth/token" username:@"username" password:@"password" scope:@"email" success:^(AFOAuthCredential *credential) { NSLog(@"Token: %@", credential.accessToken); } failure:^(NSError *error) { NSLog(@"Error: %@", error); }];

AFHTTPRequestOperationManager *manager = [[AFHTTPRequestOperationManager alloc] initWithBaseURL:baseURL]; [manager.requestSerializer setAuthorizationHeaderFieldWithCredential:credential]; [manager GET:@"/path/to/protected/resource" parameters:nil success:^(AFHTTPRequestOperation *operation, id responseObject) { NSLog(@"Success: %@", responseObject); } failure:^(AFHTTPRequestOperation *operation, NSError *error) { NSLog(@"Failure: %@", error); }];

[AFOAuthCredential storeCredential:credential withIdentifier:serviceProviderIdentifier];

AFOAuthCredential *credential = [AFOAuthCredential retrieveCredentialWithIdentifier:serviceProviderIdentifier];