Thank you @Jitheesh. Can you please list out steps that I can take to test this?

Hi @markshust

In 2.4.1, Magento changed api end point for admin token generate.

`Two-Factor Authentication is implemented for Magento Web APIs with the following changes:

AdminTokenServiceInterface::createAdminAccessToken() throws an exception when the Admin user doesn’t have personal 2FA configured, and also indicates that the confirmationh email has been sent.
AdminTokenServiceInterface::createAdminAccessToken() throws an exception that indicates which provider is configured for the user and suggests a provider-specific login endpoint.
2FA provider-specific endpoints allow each Admin user to configure a personal 2FA and provides tokens for username, password, and OTP (2FA code).`

So to disable 2fa from token generate api, I've re-enabled our previous token generate end point. ie, if you disable 2fa for token generate, you can continue to use existing end point. Otherwise you should configure 2fa and integrate new end point.

Test steps

1. upgrade Magento to 2.4.1
2. Try to generate admin token using rest api end point
   POST /V1/integration/admin/token
3. Magento will return error
4. Open store configuration and disable 2fa for token generate
5. Try to generate admin token, it will respond with token

I can confirm that this fix works, can we merge it?

I'm taking the updates, will be pushed momentarily

Thanks @markshust for your code styling suggestions, It is really helpful.

Sorry to be "that guy who's late to the party with a problem" but these changes fail to parse with PHP7.3

Typed props only appeared in 7.4 - and I wouldn't mention it at all, except composer specifies php>=7.3

Thanks @cmacdonald-au and @Rud5G -- definitely a mistake on my part. Fixed that in #6