[auth-session] token request methods (#8051)

* Created token requests

* Updated build files

* Clean up types

* Updated token methods

* Update auth-session.md

* Updated docs

* fix t

[auth-session] token request methods (#8051)

* Created token requests

* Updated build files

* Clean up types

* Updated token methods

* Update auth-session.md

* Updated docs

* fix type errors

* fix build

* Update AuthRequest.ts

* Update AuthRequest.types.js.map

* Added unit tests

* Removed tokenResponse

* Update CHANGELOG.md

* Update auth-session.md

* fix lint

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