Add Support for "login_hint" for Param in Organization Discovery

[dhaura]

Purpose

• $Subject
• When the user email is needed to be sent directly from the SP without prompting organization discovery input capture page, login_hint query paramater can be used along with fidp=OrganizationSSO param if there are b2c login options in the root application.
  • A sample authorize request is as follows.

https://localhost:9443/oauth2/authorize?scope=openid+profile+roles+email&response_type=code&redirect_uri=https://localhost:3000&client_id=<CLIENT_ID>&login_hint=<USER_EMAIL>&fidp=OrganizationSSO

• Moreover, in future, if this capability is extended to discover the organization of the user based on different user attributes other than email domain, discoveryType query param can be passed in the authorization request to specify the organization discovery type. If discovery type is not specified, email domain based discovery is used as the default type.
  • A sample authorize request is as follows.

https://localhost:9443/oauth2/authorize?scope=openid+profile+roles+email&response_type=code&redirect_uri=https://localhost:3000&client_id=<CLIENT_ID>&login_hint=<USER_EMAIL>&fidp=OrganizationSSO&discoveryType=emailDomain

Goals

• Facilitate the ability to directly specify the organization discovery type and login hint.

Approach

• Use login_hint and discoveryType query parameters in autherization request.

Related PRs

• Add Error Enum for Validating "login_hint" Attribute wso2/identity-organization-management-core#151
• Add Invalid Org Discovery Type Error Message wso2/identity-apps#6805

Related Issues

• Support "login_hint" and "orgDiscoveryType" Parameters for Organization Discovery wso2/product-is#20953

[codecov]

Codecov Report

Attention: Patch coverage is 70.73171% with 12 lines in your changes missing coverage. Please review.

Project coverage is 42.46%. Comparing base (03dc4ba) to head (f18745a).
Report is 8 commits behind head on main.

Files	Patch %	Lines
.../organization/login/OrganizationAuthenticator.java	70.73%	8 Missing and 4 partials ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##               main      #45      +/-   ##
============================================
+ Coverage     36.28%   42.46%   +6.17%     
- Complexity       61       77      +16     
============================================
  Files             3        3              
  Lines           463      504      +41     
  Branches         56       65       +9     
============================================
+ Hits            168      214      +46     
+ Misses          264      256       -8     
- Partials         31       34       +3     

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[jenkins-is-staging]

Approving the pull request based on the successful pr build https://github.com/wso2/product-is/actions/runs/10495686258