[FEATURE REQUEST] Make extended example on generate Context

[Israel-Laguan]

Current context examples are limited, and certain standard procedures in servers related to use context (setting certain request states like user auth or moving a value from one middleware to another) are not clear on how to do in thruster.

As a user, I would like to add a new field to the context, for example

• there is an endpoint to access certain DB records, that I need to be "private"
• in middleware, I would like to authenticate the user and know her/his role and what permissions she/he has
• I would like to save the role in the context as a Map or HashMap (to get later like context.user.get("roles"))
• Then in another middleware read this context field and use it in certain logic.

Another use case would be to validate input in one middleware, parse/map it, then use this modified data in another middleware.

Request

• Add an example of creating a custom Context with custom optional fields
• Add an example of setting a custom field in one middleware, and reading it in other middleware (or controller)

[trezm]

Please see #232 for examples (specifically the custom Auth one)!

[Israel-Laguan]

Solved in https://github.com/thruster-rs/Thruster/pull/232

[Israel-Laguan]

Can this be closed?