SvelteKit custom Sign in Issues

[vtempest]

Provider type

Azure Active Directory

Environment

System:
OS: Windows 11 10.0.26120
CPU: (4) x64 Intel(R) Core(TM) i5-7300HQ CPU @ 2.50GHz
Memory: 15.76 GB / 31.85 GB
Binaries:
Node: 22.11.0 - C:\Program Files\nodejs\node.EXE
Yarn: 1.22.22 - ~\AppData\Roaming\npm\yarn.CMD
npm: 10.9.0 - C:\Program Files\nodejs\npm.CMD
pnpm: 9.1.1 - ~\AppData\Local\pnpm\pnpm.CMD
bun: 1.1.42 - ~\AppData\Roaming\npm\bun.CMD
Browsers:
Edge: Chromium (127.0.26)
npmPackages:
@auth/drizzle-adapter: ^1.7.4 => 1.7.4
@auth/sveltekit: latest => 1.7.4

Reproduction URL

https://github.com/vtempest/Svelte-Starter-DOCS

Describe the issue

Awesome project to the team, and I am currently switching from Lucia because you have better docs and jwt.

SvelteKit demo should have

1. jwt sessions in auth.js for db login - use it as default
2. db schema setup so as to enable email-based
3. Email based should say "Sign in with Email" - because saying with Resend is confusing to general user who does not know Resend is a dev api tool for email.
4. Custom sign in page should be added to demo and reuse layout.svelte to keep the header footer and style of the app.
5. People will want to customize their login pages heavily, so also add callback routes in example or maybe a SPA component.
6. Export Icon for each provider. Otherwise the custom sign in page is harder to get started and its unclear how to get icon.
7. Microsoft Entra ID is broken when using the custom Sign in Page , but works fine in built in page. Gives error related to custom function not having profilePhotoSize in config when provider() is called. this can be fixed by calling provider({}) bc otherwise it tries to read profilePhotoSize from null

TypeError: Cannot read properties of undefined (reading 'profilePhotoSize')
    at MicrosoftEntraID (file:///D:/Projects/sveltekit-auth-example-official/node_modules/@auth/core/providers/microsoft-entra-id.js:88:13

How to reproduce

<script lang="ts">
  import { SignIn } from "@auth/sveltekit/components"
  import Discord from "@auth/sveltekit/providers/discord"
  import Facebook from "@auth/sveltekit/providers/facebook"
  import Google from "@auth/sveltekit/providers/google"
  import LinkedIn from "@auth/sveltekit/providers/linkedin"
  import MicrosoftEntraID from "@auth/sveltekit/providers/microsoft-entra-id"
  import Resend from "@auth/sveltekit/providers/resend"
  import type { Provider } from "@auth/sveltekit/providers"

  const providers: any[] = [
    Google,
    Discord,
    LinkedIn,
    Facebook,
    MicrosoftEntraID,
    Resend({
      from: "[email protected]",
    }),
  ]

  var providerMap = providers.map((provider) => {
    if (typeof provider === "function") {
      return provider({}) // needs the {} or MicrosoftEntraID won't work
    } else {
      return provider
    }
  })

  const getProviderLogo = (providerName: string) => {
    switch (providerName.toLowerCase()) {
      case "google":
        return `<svg class="w-6 h-6" viewBox="0 0 24 24" xmlns="http://www.w3.org/2000/svg">
          <path fill="#4285F4" d="M22.56 12.25c0-.78-.07-1.53-.2-2.25H12v4.26h5.92c-.26 1.37-1.04 2.53-2.21 3.31v2.77h3.57c2.08-1.92 3.28-4.74 3.28-8.09z"/>
          <path fill="#34A853" d="M12 23c2.97 0 5.46-.98 7.28-2.66l-3.57-2.77c-.98.66-2.23 1.06-3.71 1.06-2.86 0-5.29-1.93-6.16-4.53H2.18v2.84C3.99 20.53 7.7 23 12 23z"/>
          <path fill="#FBBC05" d="M5.84 14.09c-.22-.66-.35-1.36-.35-2.09s.13-1.43.35-2.09V7.07H2.18C1.43 8.55 1 10.22 1 12s.43 3.45 1.18 4.93l2.85-2.22.81-.62z"/>
          <path fill="#EA4335" d="M12 5.38c1.62 0 3.06.56 4.21 1.64l3.15-3.15C17.45 2.09 14.97 1 12 1 7.7 1 3.99 3.47 2.18 7.07l3.66 2.84c.87-2.6 3.3-4.53 6.16-4.53z"/>
        </svg>`
      case "discord":
        return `<svg class="w-6 h-6" viewBox="0 0 24 24" xmlns="http://www.w3.org/2000/svg">
          <path fill="#7289DA" d="M20.317 4.37a19.791 19.791 0 0 0-4.885-1.515a.074.074 0 0 0-.079.037c-.21.375-.444.864-.608 1.25a18.27 18.27 0 0 0-5.487 0a12.64 12.64 0 0 0-.617-1.25a.077.077 0 0 0-.079-.037A19.736 19.736 0 0 0 3.677 4.37a.07.07 0 0 0-.032.027C.533 9.046-.32 13.58.099 18.057a.082.082 0 0 0 .031.057a19.9 19.9 0 0 0 5.993 3.03a.078.078 0 0 0 .084-.028a14.09 14.09 0 0 0 1.226-1.994a.076.076 0 0 0-.041-.106a13.107 13.107 0 0 1-1.872-.892a.077.077 0 0 1-.008-.128a10.2 10.2 0 0 0 .372-.292a.074.074 0 0 1 .077-.01c3.928 1.793 8.18 1.793 12.062 0a.074.074 0 0 1 .078.01c.12.098.246.198.373.292a.077.077 0 0 1-.006.127a12.299 12.299 0 0 1-1.873.892a.077.077 0 0 0-.041.107c.36.698.772 1.362 1.225 1.993a.076.076 0 0 0 .084.028a19.839 19.839 0 0 0 6.002-3.03a.077.077 0 0 0 .032-.054c.5-5.177-.838-9.674-3.549-13.66a.061.061 0 0 0-.031-.03z"/>
        </svg>`
      case "linkedin":
        return `<svg class="w-6 h-6" viewBox="0 0 24 24" xmlns="http://www.w3.org/2000/svg">
          <path fill="#0A66C2" d="M20.447 20.452h-3.554v-5.569c0-1.328-.027-3.037-1.852-3.037-1.853 0-2.136 1.445-2.136 2.939v5.667H9.351V9h3.414v1.561h.046c.477-.9 1.637-1.85 3.37-1.85 3.601 0 4.267 2.37 4.267 5.455v6.286zM5.337 7.433c-1.144 0-2.063-.926-2.063-2.065 0-1.138.92-2.063 2.063-2.063 1.14 0 2.064.925 2.064 2.063 0 1.139-.925 2.065-2.064 2.065zm1.782 13.019H3.555V9h3.564v11.452zM22.225 0H1.771C.792 0 0 .774 0 1.729v20.542C0 23.227.792 24 1.771 24h20.451C23.2 24 24 23.227 24 22.271V1.729C24 .774 23.2 0 22.222 0h.003z"/>
        </svg>`
      case "facebook":
        return `<svg class="w-6 h-6" viewBox="0 0 24 24" xmlns="http://www.w3.org/2000/svg">
          <path fill="#1877F2" d="M24 12.073c0-6.627-5.373-12-12-12s-12 5.373-12 12c0 5.99 4.388 10.954 10.125 11.854v-8.385H7.078v-3.47h3.047V9.43c0-3.007 1.792-4.669 4.533-4.669c1.312 0 2.686.235 2.686.235v2.953H15.83c-1.491 0-1.956.925-1.956 1.874v2.25h3.328l-.532 3.47h-2.796v8.385C19.612 23.027 24 18.062 24 12.073z"/>
        </svg>`
      case "resend":
        return `<svg class="w-6 h-6" viewBox="0 0 24 24" xmlns="http://www.w3.org/2000/svg">
          <path fill="#2563EB" d="M20 4H4c-1.1 0-1.99.9-1.99 2L2 18c0 1.1.9 2 2 2h16c1.1 0 2-.9 2-2V6c0-1.1-.9-2-2-2zm0 4l-8 5l-8-5V6l8 5l8-5v2z"/>
        </svg>`
      case "microsoft entra id":
        return `<svg class="w-6 h-6" viewBox="0 0 24 24" xmlns="http://www.w3.org/2000/svg">
        <path fill="#f3f3f3" d="M0 0h23v23H0z"/><path fill="#f35325" d="M1 1h10v10H1z"/><path fill="#81bc06" d="M12 1h10v10H12z"/><path fill="#05a6f0" d="M1 12h10v10H1z"/><path fill="#ffba08" d="M12 12h10v10H12z"/>
        </svg>`
      default:
        return ""
    }
  }
</script>
<svelte:head>
  <title>Sign in</title>
</svelte:head>

<div class="flex items-center justify-center min-h-screen bg-gray-50">
  <div class="w-full max-w-md">
    <div class="bg-white p-8 rounded-3xl shadow-sm space-y-6">
      <div class="space-y-6">
        {#each providerMap as provider}
          {#if provider.name !== "Resend"}
            <SignIn
              provider={provider.id}
              signInPage="signin"
              className="w-half"
            >
              <!-- {#if provider.callbackUrl}
                <input
                  type="hidden"
                  name="callbackUrl"
                  value={provider.callbackUrl}
                />
              {/if} -->
              <div
                slot="submitButton"
                style={`--hover-bg: ${provider.style?.bg || provider.style?.brandColor || "#f3f3f3"}`}
                class={`relative w-full flex items-center justify-between px-4 py-3 text-gray-700 
                        border border-gray-300 rounded-xl hover:bg-[var(--hover-bg)] transition-colors duration-200 
                        focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-blue-500`}
              >
                <div class="flex items-center justify-center pr-2">
                  {@html getProviderLogo(provider.name) || ""}
                </div>
                <span class="text-base font-medium">
                  Login with {#if provider.name === "Microsoft Entra ID"}Microsoft{:else}{provider.name}{/if}
                </span>
              </div>
            </SignIn>
          {/if}
        {/each}
      </div>

      <div class="relative">
        <div class="absolute inset-0 flex items-center">
          <div class="w-full border-t border-gray-300"></div>
        </div>
        <div class="relative flex justify-center text-sm">
          <span class="px-2 text-gray-500 bg-white">or</span>
        </div>
      </div>

      <div class="space-y-4">
        {#each providerMap as provider}
          {#if provider.name === "Resend"}
            <SignIn
              provider={provider.id}
              signInPage="signin"
              className="w-full"
            >
              <div slot="submitButton" class="space-y-4 mt-4">
                <div
                  type="submit"
                  class="w-full px-4 py-3 text-white bg-blue-500 rounded-xl hover:bg-blue-600
                       transition-colors duration-200 focus:outline-none focus:ring-2
                       focus:ring-offset-2 focus:ring-blue-500"
                >
                  Send Email with Login Link
                </div>
              </div>
            </SignIn>
          {/if}
        {/each}
      </div>
    </div>
  </div>
</div>

Expected behavior

working Sign in page