Add User API Token Authentication Support

[makinoshi]

Add User API Token Authentication Support

This branch adds support for cybozu.com User API token authentication.
The User API token uses Bearer authentication in the Authorization header, which is different from the existing kintone app API token that uses the X-Cybozu-API-Token header.

Key Changes

Authentication Module (authentication.cljc):

• Added user-api-token field to the Auth record
• Updated the -header method to set Authorization: Bearer when user-api-token is provided
• Enhanced new-auth function to accept :user-api-token parameter
• Added validation to prevent simultaneous use of basic authentication and user API token (both use Authorization header)

Documentation Updates:

• Updated README.md with usage examples for User API token authentication
• Added note about mutual exclusivity between basic auth and user API token
• Added changelog entry for the new feature

Testing:

• Added test cases for User API token header generation
• Added test case to verify assertion error when basic auth and user API token are used together

Usage

  ;; User API token authentication
  (auth/new-auth {:user-api-token "your-user-api-token"})

  ;; This will throw an AssertionError (not allowed)
  (auth/new-auth {:basic {:username "user" :password "pass"}
                  :user-api-token "token"})

This enhancement enables developers to authenticate with cybozu.com User APIs using the appropriate Bearer token authentication method while maintaining backward compatibility with existing authentication mechanisms.

[egs33]

😄