Third-Party App Authorization via Token Exchange for Resource Continuity

The patent introduces an authorization code and token as intermediary elements between the user's first account (service provider A) and the second account (service provider B). The authorization code is generated by service provider A's server and transmitted to service provider B's server, which then issues a token. This token enables service provider B to continuously access and use the user's accumulated resources and information from service provider A, resolving the limitation where only basic login was possible without resource continuity.

The patent implements preliminary authorization action where the user performs a one-time authorization of service provider B to access service provider A's account information. The server generates an authorization code in advance that enables future access without requiring repeated registration procedures. This preliminary action establishes a continuous access mechanism that eliminates the need for multiple registration procedures across different service providers.