feat: Move to passport for authentication (#1934)

- Added `accountProvisioner`
- Move authentication to use passport strategies
- Make authentication more pluggable
- Change language of services -> providers

closes #1120

package.json

@@ -66,6 +66,7 @@
     "@babel/preset-env": "^7.11.0",
     "@babel/preset-flow": "^7.10.4",
     "@babel/preset-react": "^7.10.4",
+    "@outlinewiki/koa-passport": "^4.1.4",
     "@rehooks/window-scroll-position": "^1.0.1",
     "@sentry/node": "^6.1.0",
     "@sentry/react": "^6.1.0",
@@ -94,7 +95,6 @@
     "flow-typed": "^2.6.2",
     "focus-visible": "^5.1.0",
     "fs-extra": "^4.0.2",
-    "google-auth-library": "^5.5.1",
     "http-errors": "1.4.0",
     "i18next": "^19.8.3",
     "i18next-http-backend": "^1.0.21",
@@ -129,6 +129,9 @@
     "nodemailer": "^4.4.0",
     "outline-icons": "^1.24.0",
     "oy-vey": "^0.10.0",
+    "passport": "^0.4.1",
+    "passport-google-oauth2": "^0.2.0",
+    "passport-slack-oauth2": "^1.1.0",
     "pg": "^8.5.1",
     "pg-hstore": "^2.3.3",
     "polished": "3.6.5",