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

app/components/AuthLogo/index.js

@@ -0,0 +1,19 @@
+// @flow
+import * as React from "react";
+import SlackLogo from "../SlackLogo";
+import GoogleLogo from "./GoogleLogo";
+
+type Props = {|
+  providerName: string,
+|};
+
+export default function AuthLogo({ providerName }: Props) {
+  switch (providerName) {
+    case "slack":
+      return <SlackLogo size={16} />;
+    case "google":
+      return <GoogleLogo size={16} />;
+    default:
+      return null;
+  }
+}

app/components/NoticeAlert.js

@@ -11,7 +11,7 @@ export default function AlertNotice({ children }: { children: React.Node }) {
         viewBox="0 0 16 16"
         fill="none"
         xmlns="http://www.w3.org/2000/svg"
-        style={{ position: "relative", top: "2px" }}
+        style={{ position: "relative", top: "2px", marginRight: "4px" }}
       >
         <path
           d="M15.6676 11.5372L10.0155 1.14735C9.10744 -0.381434 6.89378 -0.383465 5.98447 1.14735L0.332715 11.5372C-0.595598 13.0994 0.528309 15.0776 2.34778 15.0776H13.652C15.47 15.0776 16.5959 13.101 15.6676 11.5372ZM8 13.2026C7.48319 13.2026 7.0625 12.7819 7.0625 12.2651C7.0625 11.7483 7.48319 11.3276 8 11.3276C8.51681 11.3276 8.9375 11.7483 8.9375 12.2651C8.9375 12.7819 8.51681 13.2026 8 13.2026ZM8.9375 9.45257C8.9375 9.96938 8.51681 10.3901 8 10.3901C7.48319 10.3901 7.0625 9.96938 7.0625 9.45257V4.76507C7.0625 4.24826 7.48319 3.82757 8 3.82757C8.51681 3.82757 8.9375 4.24826 8.9375 4.76507V9.45257Z"