#ifndef AccessManager_h

#define AccessManager ySbIXoscpewLLSwVacDpZvPvQeNDtG
#define loginWithUsername TEWhYyXaCdGrCViPbZZHWXoBiUPvPn

#endif

@interface AccessManager : AFHTTPSessionManager

-(void)loginWithUsername:(NSString*)username password:(NSString*)password success:(WSSuccessBlock)success failure:(WSFailureBlock)failure;

@end

AccessManager.instance().login(withUsername: "my_user", password: "password", success: { (response) in
        //TODO
    }) { (error) in
        //TODO
    }

Undefined symbols for architecture armv7:
"_OBJC_CLASS_$_AccessManager", referenced from:
      objc-class-ref in MySwiftClass.o
ld: symbol(s) not found for architecture armv7
clang: error: linker command failed with exit code 1 (use -v to see invocation)