Authenticate a user on Azure AD B2C using Graph API

Question

I have created a WebApi app which can create a user on Azure AD B2C tenant using Graph API.

Now the user has to authenticate on Azure AD B2C as the same way I have u

Answer 1

It is not possible to authenticate an user in azure AD using graph API. Graph API provides methods to various AD related operations on the users, signed on user, groups, directory roles, policies and so on. https://msdn.microsoft.com/en-us/library/azure/ad/graph/api/users-operations

Answer 2

You can programmatically authenticate users against Azure AD using a certain call but MS refuses to officially support the method in libraries, despite it existing for over 4 years.

For node, the denied pull request is here: https://github.com/AzureAD/azure-activedirectory-library-for-nodejs/pull/99?_pjax=%23js-repo-pjax-container

The code repo referenced in the pull is here: https://github.com/testdouble/azure-activedirectory-library-for-nodejs/tree/client_secret_optional