feat: Hide guest and improve signin message.

Since guest mode doesn't work in production, remove it from the list of
providers for now and also improve the messaging on the Signin page to
make it clear that sign-in won't work if you're not a part of the
`openedx` github org.

packages/app/src/App.tsx

@@ -38,15 +38,15 @@ import { SignInProviderConfig } from '@backstage/core-components';
 const githubProvider: SignInProviderConfig = {
   id: 'github-auth-provider',
   title: 'GitHub',
-  message: 'Sign in using GitHub',
+  message: 'You must be a member of the "openedx" github org.',
   apiRef: githubAuthApiRef,
 };
 // End changes for GitHub Auth
 const app = createApp({
   apis,
   components: {
     SignInPage: props => (
-      <SignInPage {...props} auto providers={[githubProvider, 'guest']} />
+      <SignInPage {...props} auto providers={[githubProvider]} />
     ),
   },
   bindRoutes({ bind }) {

yarn.lock

@@ -10438,7 +10438,7 @@
   resolved "https://registry.yarnpkg.com/@types/range-parser/-/range-parser-1.2.4.tgz#cd667bcfdd025213aafb7ca5915a932590acdcdc"
   integrity sha512-EEhsLsD6UsDM1yFhAvy0Cjr6VwmpMWqFBCb9w07wVugF7w9nfajxLuVmngTIpgS6svCnm6Vaw+MZhoDCKnOfsw==
 
-"@types/react-dom@*", "@types/react-dom@^18.0.0":
+"@types/react-dom@*", "@types/react-dom@^18", "@types/react-dom@^18.0.0":
   version "18.3.0"
   resolved "https://registry.yarnpkg.com/@types/react-dom/-/react-dom-18.3.0.tgz#0cbc818755d87066ab6ca74fbedb2547d74a82b0"
   integrity sha512-EhwApuTmMBmXuFOikhQLIBUn6uFg81SwLMOAUgodJF14SOBOCMdU04gDoYi0WOJJHD144TL32z4yDqCW3dnkQg==
@@ -10476,23 +10476,14 @@
   dependencies:
     "@types/react" "*"
 
-"@types/react@*", "@types/react@^16.13.1 || ^17.0.0 || ^18.0.0":
-  version "18.3.3"
-  resolved "https://registry.yarnpkg.com/@types/react/-/react-18.3.3.tgz#9679020895318b0915d7a3ab004d92d33375c45f"
-  integrity sha512-hti/R0pS0q1/xx+TsI73XIqk26eBsISZ2R0wUijXIngRK9R/e7Xw/cXVxQK7R5JjW+SV4zGcn5hXjudkN/pLIw==
+"@types/react@*", "@types/react@^16.13.1 || ^17.0.0", "@types/react@^16.13.1 || ^17.0.0 || ^18.0.0", "@types/react@^18":
+  version "18.3.4"
+  resolved "https://registry.yarnpkg.com/@types/react/-/react-18.3.4.tgz#dfdd534a1d081307144c00e325c06e00312c93a3"
+  integrity sha512-J7W30FTdfCxDDjmfRM+/JqLHBIyl7xUIp9kwK637FGmY7+mkSFSe6L4jpZzhj5QMfLssSDP4/i75AKkrdC7/Jw==
   dependencies:
     "@types/prop-types" "*"
     csstype "^3.0.2"
 
-"@types/react@^16.13.1 || ^17.0.0":
-  version "17.0.80"
-  resolved "https://registry.yarnpkg.com/@types/react/-/react-17.0.80.tgz#a5dfc351d6a41257eb592d73d3a85d3b7dbcbb41"
-  integrity sha512-LrgHIu2lEtIo8M7d1FcI3BdwXWoRQwMoXOZ7+dPTW0lYREjmlHl3P0U1VD0i/9tppOuv8/sam7sOjx34TxSFbA==
-  dependencies:
-    "@types/prop-types" "*"
-    "@types/scheduler" "^0.16"
-    csstype "^3.0.2"
-
 "@types/request@^2.47.1":
   version "2.48.8"
   resolved "https://registry.yarnpkg.com/@types/request/-/request-2.48.8.tgz#0b90fde3b655ab50976cb8c5ac00faca22f5a82c"
@@ -10530,11 +10521,6 @@
   resolved "https://registry.yarnpkg.com/@types/retry/-/retry-0.12.2.tgz#ed279a64fa438bb69f2480eda44937912bb7480a"
   integrity sha512-XISRgDJ2Tc5q4TRqvgJtzsRkFYNJzZrhTdtMoGVBttwzzQJkPnS3WWTFc7kuDRoPtPakl+T+OfdEUjYJj7Jbow==
 
-"@types/scheduler@^0.16":
-  version "0.16.8"
-  resolved "https://registry.yarnpkg.com/@types/scheduler/-/scheduler-0.16.8.tgz#ce5ace04cfeabe7ef87c0091e50752e36707deff"
-  integrity sha512-WZLiwShhwLRmeV6zH+GkbOFT6Z6VklCItrDioxUnv+u4Ll+8vKeFySoFyK/0ctcRpOmwAicELfmys1sDc/Rw+A==
-
 "@types/semver@^7.5.0":
   version "7.5.4"
   resolved "https://registry.yarnpkg.com/@types/semver/-/semver-7.5.4.tgz#0a41252ad431c473158b22f9bfb9a63df7541cff"