Re: Refactor elpa/oauth2.el to use plist over cl-defstruct

[Soham Gumaste]

> In this case, since `plstore` is used to store the information, it would 
> make it much easier to use a plist as it could be stored and retrieved 
> as-is, instead of having to convert between struct<-->plist every time.

Also, storing the buffer object itself (instead of just a path) in the 
plstore field makes it impossible to directly serialize the struct, as 
when its read back it doesn't parse the #<buffer part correctly.