How to return auth Token from .Net Core [Authorize] method

Here’s what I’ve come up with after looking through the suggestions here:

    [AllowAnonymous]
    [HttpGet("Login")]
    public IActionResult Login()
    {
        return Challenge(new AuthenticationProperties
        {
            RedirectUri = $"{HttpContext.Request.PathBase.Value}/GetToken"
        }, OpenIdConnectDefaults.AuthenticationScheme);
    }

    [Authorize(AuthenticationSchemes = OpenIdConnectDefaults.AuthenticationScheme)]
    [HttpGet("GetToken")]
    public IActionResult GetToken()
    {
        var token = _contextAccessor.HttpContext.GetTokenAsync(OpenIdConnectDefaults.AuthenticationScheme, "id_token").Result;

        return Ok(new
        {
            Token = token
        });
    }

I combined two APIs. From the perspective of the client app it makes a call to a Login API and gets the token as the result. Behind the scenes the Login API redirects to a second API to get and return the token.

UPDATE:

Revisting this after a while in case anyone sees this. I don’t remember exactly how, but I think there was a problem with above approach for me.

In the end I used the OnSignedIn CookieAuthenticationHandler event to intercept the token and returned it with the response in a Cookie. The Login API still returns a Challenge request.