update: improved retrieval of cookies workflow

[ahuangg]

Issue

• previous commit only adds the cookie to the config.json when the program is ran for the first time, this will require manual intervention if anything happens to the cookie.

Solution

• updated cookie workflow to check if the user is logged in
• the cookie updates if the user is logged in and the new cookie is not the same as the current one
• moved the function call to when the config is being loaded into the program

Concerns

• takes a few seconds after logging in for retrieval to work properly
• user now has to be logged in Weibo on Chrome for this program to run

[dataabc]

已merge，感谢贡献代码。

[ahuangg]

有没有什么功能,你希望我开发？

[dataabc]

太感谢了，不过暂时没有。

[ahuangg]

好的，没问题！如果以后有需要的话，随时告诉我。