Bearer token support for User Authentication

[erikn69]

Context

• PR: [9.x] User authentication for Pusher framework#42531
• signin() method: https://pusher.com/docs/channels/using_channels/user-authentication/#sign-in
• Complement of User Authentication #340

Breaking Changes

None.

[taylorotwell]

I am closing this pull request because it lacks sufficient explanation, tests, or both. It is difficult for us to merge pull requests without these things because the change may introduce breaking changes to the framework.

Feel free to re-submit your change with a thorough explanation of the feature and tests - integration tests are preferred over unit tests. Please include it's benefit to end users; the reasons it does not break any existing features; how it makes building web applications easier, etc.

Thanks!

[jose123v]

it seems that only the title is enough to know what happens, maybe here they are too lazy to read two lines of code