Left some TODO's. Next thing is to check if the token is valid

include/token_manager.h

@@ -1,9 +1,11 @@
 #ifndef TOKEN_MANAGER_H_
 #define TOKEN_MANAGER_H_
 
+#include <string>
 #include <string_view>
 
 #include "models.h"
+#include "types/scopes.h"
 
 class token_manager
 {
@@ -12,6 +14,8 @@ public:
 
     loginResult retrieve_token();
     loginResult retrieve_token(std::string_view);
+
+    bool is_token_valid(std::string&, Scope);
 private:
     auth_credentials parse_auth_credentials(std::string_view);
 };