docs: migrate loopback-example-passport repo as lb4 example

examples/passport-login/.eslintignore

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+node_modules/
+dist/
+coverage/

examples/passport-login/.eslintrc.js

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+module.exports = {
+  extends: '@loopback/eslint-config',
+};

examples/passport-login/.gitignore

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+# Logs
+logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+
+# Runtime data
+pids
+*.pid
+*.seed
+*.pid.lock
+
+# Directory for instrumented libs generated by jscoverage/JSCover
+lib-cov
+
+# Coverage directory used by tools like istanbul
+coverage
+
+# nyc test coverage
+.nyc_output
+
+# Grunt intermediate storage (http://gruntjs.com/creating-plugins#storing-task-files)
+.grunt
+
+# Bower dependency directory (https://bower.io/)
+bower_components
+
+# node-waf configuration
+.lock-wscript
+
+# Compiled binary addons (http://nodejs.org/api/addons.html)
+build/Release
+
+# Dependency directories
+node_modules/
+jspm_packages/
+
+# Typescript v1 declaration files
+typings/
+
+# Optional npm cache directory
+.npm
+
+# Optional eslint cache
+.eslintcache
+
+# Optional REPL history
+.node_repl_history
+
+# Output of 'npm pack'
+*.tgz
+
+# Yarn Integrity file
+.yarn-integrity
+
+# dotenv environment variables file
+.env
+
+# Transpiled JavaScript files from Typescript
+/dist
+
+# Cache used by TypeScript's incremental build
+*.tsbuildinfo

examples/passport-login/.npmignore

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+# Exclude *.tsbuildinfo - cache for tsc incremental builds
+*.tsbuildinfo

examples/passport-login/.npmrc

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+package-lock=true

examples/passport-login/.prettierignore

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+dist
+*.json

examples/passport-login/.prettierrc

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+{
+  "bracketSpacing": false,
+  "singleQuote": true,
+  "printWidth": 80,
+  "trailingComma": "all"
+}

examples/passport-login/data/db.json

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+{
+  "ids": {
+    "User": 2,
+    "UserIdentity": 100487451443373280000
+  },
+  "models": {
+    "User": {
+      "1": "{\"name\":\"Open Graph Test User\",\"username\":\"[email protected]\",\"email\":\"[email protected]\",\"id\":1}"
+    },
+    "UserIdentity": {
+      "104566694532668": "{\"id\":\"104566694532668\",\"provider\":\"facebook\",\"profile\":{\"emails\":[{\"value\":\"[email protected]\"}]},\"authScheme\":\"facebook\",\"created\":\"2020-04-07T18:40:25.360Z\",\"userId\":1}",
+      "100487451443373281118": "{\"id\":\"100487451443373281118\",\"provider\":\"google\",\"profile\":{\"emails\":[{\"value\":\"[email protected]\",\"type\":\"account\"}]},\"authScheme\":\"google\",\"created\":\"2020-04-07T18:40:52.941Z\",\"userId\":1}"
+    }
+  }
+}

examples/passport-login/index.js

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+// Copyright IBM Corp. 2020. All Rights Reserved.
+// Node module: @loopback/example-passport-login
+// This file is licensed under the MIT License.
+// License text available at https://opensource.org/licenses/MIT
+
+const application = require('./dist');
+
+module.exports = application;
+
+if (require.main === module) {
+  // Run the application
+  const config = {
+    rest: {
+      port: +(process.env.PORT || 3000),
+      host: process.env.HOST,
+      protocol: 'http',
+      gracePeriodForClose: 5000, // 5 seconds
+      openApiSpec: {
+        // useful when used with OpenAPI-to-GraphQL to locate your application
+        setServersFromRequest: true,
+      },
+      // Use the LB4 application as a route. It should not be listening.
+      listenOnStart: false,
+    },
+  };
+  application.main(config).catch(err => {
+    console.error('Cannot start the application.', err);
+    process.exit(1);
+  });
+}

examples/passport-login/index.ts

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+export * from './src';

examples/passport-login/oauth2-providers.json

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+{
+    "facebook-login": {
+        "provider": "facebook",
+        "module": "passport-facebook",
+        "profileFields": ["gender", "link", "locale", "name", "timezone",
+        "verified", "email", "updated_time", "displayName", "id"],
+        "clientID": "{facebook-client-id}",
+        "clientSecret": "ad4315e3453b012f6e4b8dd4bc1c0ae6",
+        "callbackURL": "/api/auth/thirdparty/facebook/callback",
+        "authPath": "/api/auth/thirdparty/facebook",
+        "callbackPath": "/api/auth/thirdparty/facebook/callback",
+        "successRedirect": "/auth/account",
+        "failureRedirect": "/login",
+        "scope": ["email"],
+        "failureFlash": true
+    },
+    "google-login": {
+        "provider": "google",
+        "module": "passport-google-oauth2",
+        "strategy": "OAuth2Strategy",
+        "clientID": "{google-client-id}",
+        "clientSecret": "FcldSqY5-9usqlRmQhZawN__",
+        "callbackURL": "/api/auth/thirdparty/google/callback",
+        "authPath": "/api/auth/thirdparty/google",
+        "callbackPath": "/api/auth/thirdparty/google/callback",
+        "successRedirect": "/auth/account",
+        "failureRedirect": "/login",
+        "scope": ["email", "profile"],
+        "failureFlash": true
+    },
+    "oauth2": {
+        "provider": "oauth2",
+        "module": "passport-google-oauth2",
+        "strategy": "OAuth2Strategy",
+        "clientID": "{google-client-id}",
+        "clientSecret": "FcldSqY5-9usqlRmQhZawN__",
+        "callbackURL": "/api/auth/thirdparty/google/callback",
+        "authPath": "/api/auth/thirdparty/google",
+        "callbackPath": "/api/auth/thirdparty/google/callback",
+        "successRedirect": "/auth/account",
+        "failureRedirect": "/login",
+        "scope": ["email", "profile"],
+        "failureFlash": true,
+        "authorizationURL": "https://localhost:8080",
+        "tokenURL": "https://localhost:8080"
+    }
+}